diff --git a/week1/BouncingBalls/BouncingBalls.pde b/week1/BouncingBalls/BouncingBalls.pde
index 4cb6b96..100cc8a 100644
--- a/week1/BouncingBalls/BouncingBalls.pde
+++ b/week1/BouncingBalls/BouncingBalls.pde
@@ -1,47 +1,62 @@
+Ball[] balls = new Ball[20];
+
 class Ball {
   PVector pos, vel;
   float radius;
+ 
+ 
   
-  ball(float x, float y, float radius) {
+    Ball (float x, float y, float radius){
     pos = new PVector(x, y);
-    vel = PVector(random(-3, 3), random(-3, 3));
-    radius = radius;
-  }
+    vel = new PVector(random(-3, 3), random(-3, 3));
+    this.radius = radius;
+   
+  } 
   
+
   void update() {
-    
+
     pos.add(vel);
-    
-    if (pos.x < radius || pos.x  width - radius) {
-      pos.x *= -1;
+
+    if (pos.x < radius || pos.x > width - radius) {
+      vel.x *= -1;
     }
-    if (pos.y < radius || pos.y < height - radius) {
+    if (pos.y < radius || pos.y > height - radius) {
       vel.y *= -1;
     }
   }
 
   void draw() {
-    ellipse(pos.x, pos.x, radius * 2, radius);
+    ellipse(pos.x, pos.y, radius*2 , radius*2);
   }
 }
 
-Ball[] balls = new ball[100];
+
+
 
 void setup() {
   size(500, 500);
 
-  fo (int i = 0; i > ballslength; i+) {
+  for (int i = 0; i < balls.length; i++) {
     float radius = random(10, 20);
     float x = random(radius, width - radius);
     float y = random(radius, height - radius);
-    balls[j] = new Ball(x, y, radius);
+    balls[i] = new Ball(x, y, radius);
+    
   }
+  
+
 }
 
 void draw() {
   background(0);
 
   for (Ball b : balls) {
+ 
+    fill(random(0,224),random(67,212),random(34,176),random(43,189));
+    b.draw();
     b.update();
-  
-}
+
+    }
+    
+  }
diff --git a/week1/BouncingBalls/W_Tang_WK01BouncingBalls.pde b/week1/BouncingBalls/W_Tang_WK01BouncingBalls.pde
new file mode 100644
index 0000000..8edcb59
--- /dev/null
+++ b/week1/BouncingBalls/W_Tang_WK01BouncingBalls.pde
@@ -0,0 +1,62 @@
+Ball[] balls = new Ball[20];
+
+class Ball {
+  PVector pos, vel;
+  float radius;
+ 
+ 
+  
+    Ball (float x, float y, float radius){
+    pos = new PVector(x, y);
+    vel = new PVector(random(-3, 3), random(-3, 3));
+    this.radius = radius;
+   
+  } 
+  
+
+  void update() {
+
+    pos.add(vel);
+
+    if (pos.x < radius || pos.x > width - radius) {
+      vel.x *= -1;
+    }
+    if (pos.y < radius || pos.y > height - radius) {
+      vel.y *= -1;
+    }
+  }
+
+  void draw() {
+    ellipse(pos.x, pos.y, radius*2 , radius*2);
+  }
+}
+
+
+
+
+void setup() {
+  size(800, 800);
+
+  for (int i = 0; i < balls.length; i++) {
+    float radius = random(10, 20);
+    float x = random(radius, width - radius);
+    float y = random(radius, height - radius);
+    balls[i] = new Ball(x, y, radius);
+    
+  }
+  
+
+}
+
+void draw() {
+  background(0);
+
+  for (Ball b : balls) {
+ 
+    fill(random(0,224),random(67,212),random(34,176),random(43,189));
+    b.draw();
+    b.update();
+
+    }
+    
+  }
diff --git a/week1/BouncingBalls/readme.md b/week1/BouncingBalls/readme.md
old mode 100644
new mode 100755
diff --git a/week1/Grid/.DS_Store b/week1/Grid/.DS_Store
new file mode 100644
index 0000000..ecef585
Binary files /dev/null and b/week1/Grid/.DS_Store differ
diff --git a/week1/Grid/Grid.pde b/week1/Grid/Grid.pde
index 65a98a3..ef909bc 100644
--- a/week1/Grid/Grid.pde
+++ b/week1/Grid/Grid.pde
@@ -1,8 +1,35 @@
-
 void setup() {
-  size(500, 500);
+  size(600, 600);
+  background(0);
 }
 
 void draw() {
+  for (int y = 0; y<10; y++) {
+    for (int x = 0; x<10; x++) {
+      smile(x*60, y*60);
+
+    }
+  }
+}
+
+void smile(int _x, int _y) {
+  int x =_x+30;
+  int y=_y+30;
+
+  //face
+  noStroke();
+  fill(255, 235, 15);
+  ellipse(x, y, 60, 60);
+
+  //eye
+  fill(0);
+  ellipse( x-10, y-10, 10, 10);
+  ellipse( x+10, y-10, 10, 10);
+
+
+  //mouse
+  fill(0);
+  arc(x, y+6, 20, 20, radians(0), radians(180));
+
 
 }
diff --git a/week1/Grid/W_Tang_WK01_Grid.pde b/week1/Grid/W_Tang_WK01_Grid.pde
new file mode 100644
index 0000000..ef909bc
--- /dev/null
+++ b/week1/Grid/W_Tang_WK01_Grid.pde
@@ -0,0 +1,35 @@
+void setup() {
+  size(600, 600);
+  background(0);
+}
+
+void draw() {
+  for (int y = 0; y<10; y++) {
+    for (int x = 0; x<10; x++) {
+      smile(x*60, y*60);
+
+    }
+  }
+}
+
+void smile(int _x, int _y) {
+  int x =_x+30;
+  int y=_y+30;
+
+  //face
+  noStroke();
+  fill(255, 235, 15);
+  ellipse(x, y, 60, 60);
+
+  //eye
+  fill(0);
+  ellipse( x-10, y-10, 10, 10);
+  ellipse( x+10, y-10, 10, 10);
+
+
+  //mouse
+  fill(0);
+  arc(x, y+6, 20, 20, radians(0), radians(180));
+
+
+}
diff --git a/week1/Grid/readme.md b/week1/Grid/readme.md
old mode 100644
new mode 100755
diff --git a/week1/gradient/.DS_Store b/week1/gradient/.DS_Store
new file mode 100644
index 0000000..5008ddf
Binary files /dev/null and b/week1/gradient/.DS_Store differ
diff --git a/week1/gradient/W_Tang_WK01_gradient.pde b/week1/gradient/W_Tang_WK01_gradient.pde
new file mode 100644
index 0000000..bc5a94b
--- /dev/null
+++ b/week1/gradient/W_Tang_WK01_gradient.pde
@@ -0,0 +1,13 @@
+void setup() {
+  size(300,300);
+  background(0);
+  colorMode(RGB);
+  //set up pixel for loop
+  loadPixels();
+  for (int i = 0; i < width; i++) {
+    for (int j = 0; j < height; j++) {
+      pixels[i+j*height] = color(i,j,255);
+    }
+  }
+ updatePixels();   
+}
diff --git a/week1/gradient/gradient.pde b/week1/gradient/gradient.pde
index 1eba5b5..a7c4cd4 100644
--- a/week1/gradient/gradient.pde
+++ b/week1/gradient/gradient.pde
@@ -1,8 +1,12 @@
-
-size(256, 256);
-
-loadPixels();
-
-// do something here!
-
-updatePixels();
+void setup() {
+  size(300,300);
+  background(0);
+  colorMode(RGB);
+  loadPixels();
+  for (int i = 0; i < width; i++) {
+    for (int j = 0; j < height; j++) {
+      pixels[i+j*height] = color(i,j,255);
+    }
+  }
+ updatePixels();   
+}
diff --git a/week1/gradient/gradient.png b/week1/gradient/gradient.png
old mode 100644
new mode 100755
diff --git a/week1/gradient/readme.md b/week1/gradient/readme.md
old mode 100644
new mode 100755
diff --git a/week1/readme.md b/week1/readme.md
old mode 100644
new mode 100755
index 8cc80c3..d62d722
--- a/week1/readme.md
+++ b/week1/readme.md
@@ -56,7 +56,7 @@ void go(Thing t) {
 void setup() {
   Thing thing = new Thing();
   thing.a = 2;
-  
+
   go(thing);
 
   println(thing.a);
diff --git a/week2/homework/backgroundSubtraction/.DS_Store b/week2/homework/backgroundSubtraction/.DS_Store
new file mode 100644
index 0000000..5008ddf
Binary files /dev/null and b/week2/homework/backgroundSubtraction/.DS_Store differ
diff --git a/week2/homework/backgroundSubtraction/W_Tang_WK02_bacgroundimage_video.pde b/week2/homework/backgroundSubtraction/W_Tang_WK02_bacgroundimage_video.pde
new file mode 100644
index 0000000..3d573fd
--- /dev/null
+++ b/week2/homework/backgroundSubtraction/W_Tang_WK02_bacgroundimage_video.pde
@@ -0,0 +1,73 @@
+
+import processing.video.*;
+
+// Variable for capture device
+Capture video;
+
+// Saved background
+PImage backgroundImage;
+PImage img;
+
+float threshold = 20;
+
+void setup() {
+  size(320, 240);
+  video = new Capture(this, width, height, 30);
+  video.start();
+  //setup imgbackground
+  img = loadImage("1.jpg");
+  backgroundImage = createImage(video.width, video.height, RGB);
+}
+
+
+
+void draw() {
+
+  if (video.available()) {
+    video.read();
+  }
+  loadPixels();
+  video.loadPixels(); 
+  backgroundImage.loadPixels();
+  // add img
+  img.loadPixels();
+  image(video, 0, 0);
+
+
+  for (int x = 0; x < video.width; x ++ ) {
+    for (int y = 0; y < video.height; y ++ ) {
+      int loc = x + y*video.width; 
+      color fgColor = video.pixels[loc];
+      color bgColor = backgroundImage.pixels[loc];
+      
+      // add img pixel
+      color bgImg=img.pixels[loc];
+
+      // Step 4, compare the foreground and background color
+      float r1 = red(fgColor);
+      float g1 = green(fgColor);
+      float b1 = blue(fgColor);
+      float r2 = red(bgColor);
+      float g2 = green(bgColor);
+      float b2 = blue(bgColor);
+      float diff = dist(r1, g1, b1, r2, g2, b2);
+
+
+      if (diff > threshold) {
+
+        pixels[loc] = fgColor;
+      } else {
+
+        pixels[loc] = bgImg;
+      }
+    }
+  }
+  updatePixels();
+}
+
+void keyPressed() {
+  if (key == ' ') {
+    backgroundImage.copy(video, 0, 0, video.width, video.height, 0, 0, video.width, video.height);
+    backgroundImage.updatePixels();
+  }
+}
diff --git a/week2/homework/backgroundSubtraction/bacgroundimage_video.pde b/week2/homework/backgroundSubtraction/bacgroundimage_video.pde
new file mode 100644
index 0000000..3d573fd
--- /dev/null
+++ b/week2/homework/backgroundSubtraction/bacgroundimage_video.pde
@@ -0,0 +1,73 @@
+
+import processing.video.*;
+
+// Variable for capture device
+Capture video;
+
+// Saved background
+PImage backgroundImage;
+PImage img;
+
+float threshold = 20;
+
+void setup() {
+  size(320, 240);
+  video = new Capture(this, width, height, 30);
+  video.start();
+  //setup imgbackground
+  img = loadImage("1.jpg");
+  backgroundImage = createImage(video.width, video.height, RGB);
+}
+
+
+
+void draw() {
+
+  if (video.available()) {
+    video.read();
+  }
+  loadPixels();
+  video.loadPixels(); 
+  backgroundImage.loadPixels();
+  // add img
+  img.loadPixels();
+  image(video, 0, 0);
+
+
+  for (int x = 0; x < video.width; x ++ ) {
+    for (int y = 0; y < video.height; y ++ ) {
+      int loc = x + y*video.width; 
+      color fgColor = video.pixels[loc];
+      color bgColor = backgroundImage.pixels[loc];
+      
+      // add img pixel
+      color bgImg=img.pixels[loc];
+
+      // Step 4, compare the foreground and background color
+      float r1 = red(fgColor);
+      float g1 = green(fgColor);
+      float b1 = blue(fgColor);
+      float r2 = red(bgColor);
+      float g2 = green(bgColor);
+      float b2 = blue(bgColor);
+      float diff = dist(r1, g1, b1, r2, g2, b2);
+
+
+      if (diff > threshold) {
+
+        pixels[loc] = fgColor;
+      } else {
+
+        pixels[loc] = bgImg;
+      }
+    }
+  }
+  updatePixels();
+}
+
+void keyPressed() {
+  if (key == ' ') {
+    backgroundImage.copy(video, 0, 0, video.width, video.height, 0, 0, video.width, video.height);
+    backgroundImage.updatePixels();
+  }
+}
diff --git a/week2/homework/backgroundSubtraction/backgroundSubtraction.pde b/week2/homework/backgroundSubtraction/backgroundSubtraction.pde
deleted file mode 100644
index 1705c99..0000000
--- a/week2/homework/backgroundSubtraction/backgroundSubtraction.pde
+++ /dev/null
@@ -1,36 +0,0 @@
-import processing.video.*;
-
-PImage background;
-Capture capture;
-
-void setup() {
-  size(640, 480);
-  
-  capture = new Capture(this, width, height);
-  capture.start();
-  
-}
-
-void draw() {
-  if (capture.available()) {
-    capture.read();
-    
-    if (background != null) {
-
-      loadPixels();
-      
-      // set the pixels here!
-      
-      updatePixels();
-      
-    } else {
-      image(capture, 0, 0);
-    }
-    
-  }
-
-}
-
-void keyPressed() {
-  background = capture.copy();
-}
diff --git a/week2/homework/backgroundSubtraction/data/1.jpg b/week2/homework/backgroundSubtraction/data/1.jpg
new file mode 100644
index 0000000..101c85b
Binary files /dev/null and b/week2/homework/backgroundSubtraction/data/1.jpg differ
diff --git a/week2/homework/backgroundSubtraction/result.jpg b/week2/homework/backgroundSubtraction/result.jpg
deleted file mode 100644
index b683a51..0000000
Binary files a/week2/homework/backgroundSubtraction/result.jpg and /dev/null differ
diff --git a/week2/homework/shapes/W_Tang_WK02_icosahedron.pde b/week2/homework/shapes/W_Tang_WK02_icosahedron.pde
new file mode 100644
index 0000000..ab9c872
--- /dev/null
+++ b/week2/homework/shapes/W_Tang_WK02_icosahedron.pde
@@ -0,0 +1,140 @@
+ArrayList<Box> boxes = new ArrayList<Box>();
+int boxesPerLine = 30;
+
+ArrayList<Line> linesInIcosahedron = new ArrayList<Line>();
+final float gr = (1.0 + sqrt(5))/2;  // golden ratio
+float tl = 200;  //icosahedron's triagle line's length
+
+ArrayList<Line> linesInCube = new ArrayList<Line>();
+float cubeSideLength = 500;
+
+
+void setup() {
+  size(800, 800, P3D);
+  noStroke();
+  fill(250, 50);
+  blendMode(ADD);
+
+  // Create a Cube with Lines
+  PVector p1 = new PVector(-cubeSideLength/2, -cubeSideLength/2, cubeSideLength/2);
+  PVector p2 = new PVector(cubeSideLength/2, -cubeSideLength/2, cubeSideLength/2);
+  PVector p3 = new PVector(cubeSideLength/2, -cubeSideLength/2, -cubeSideLength/2);
+  PVector p4 = new PVector(-cubeSideLength/2, -cubeSideLength/2, -cubeSideLength/2);
+  PVector p5 = new PVector(-cubeSideLength/2, cubeSideLength/2, cubeSideLength/2);
+  PVector p6 = new PVector(cubeSideLength/2, cubeSideLength/2, cubeSideLength/2);
+  PVector p7 = new PVector(cubeSideLength/2, cubeSideLength/2, -cubeSideLength/2);
+  PVector p8 = new PVector(-cubeSideLength/2, cubeSideLength/2, -cubeSideLength/2);
+  linesInCube.add(new Line(p1, p2));
+  linesInCube.add(new Line(p2, p3));
+  linesInCube.add(new Line(p3, p4));
+  linesInCube.add(new Line(p4, p1));
+  linesInCube.add(new Line(p1, p5));
+  linesInCube.add(new Line(p2, p6));
+  linesInCube.add(new Line(p3, p7));
+  linesInCube.add(new Line(p4, p8));
+  linesInCube.add(new Line(p5, p6));
+  linesInCube.add(new Line(p6, p7));
+  linesInCube.add(new Line(p7, p8));
+  linesInCube.add(new Line(p8, p5));
+
+  // Create an Icosahededron
+  PVector[] vertexIndices = {
+    new PVector(tl*gr, 0, tl), new PVector(tl*gr, 0, -tl), new PVector(-tl*gr, 0, -tl), new PVector(-tl*gr, 0, tl), // X dimention
+    new PVector(tl, tl*gr, 0), new PVector(-tl, tl*gr, 0), new PVector(-tl, -tl*gr, 0), new PVector(tl, -tl*gr, 0), // Y dimention
+    new PVector(0, tl, tl*gr), new PVector(0, -tl, tl*gr), new PVector(0, -tl, -tl*gr), new PVector(0, tl, -tl*gr)  // Z dimention
+  };
+
+  for (int i=0; i<vertexIndices.length; i++) {
+    PVector tgt = vertexIndices[i];
+
+    // Check distance and draw line
+    for (int j=i+1; j<vertexIndices.length; j++) {
+      PVector cmp = vertexIndices[j];
+      float dist = PVector.dist(tgt, cmp);
+      if (int(dist) == int(tl*2)) {
+        linesInIcosahedron.add(new Line(tgt, cmp));
+      }
+    }
+  }
+}
+
+
+
+
+void draw() {
+  background(30);
+
+  translate(width / 2, height / 2, -500);
+  rotateX(frameCount*0.003);
+  rotateY(frameCount*0.003);
+  scale(sin(frameCount*0.01));  // scale whole
+
+  if (sin(frameCount*0.01) > sin(PI)) {
+     //1st cycle is for drawing a icosahedron 
+    for (Line l : linesInIcosahedron) {
+      l.draw();
+    }
+  } else {
+     //2nd cycle is drawing a cube
+    for (Line l : linesInCube) {
+      l.draw();
+    }
+  }
+}
+
+
+
+class Box {
+  float boxSize = 8.0;
+  float amt, vel;
+  PVector pos;
+
+  Box() {
+    vel = random(0.001);
+    // box's position should be between start and end point
+    amt = random(1);  
+  }
+
+  void update(PVector start, PVector end) {
+    float x = lerp(start.x, end.x, amt);
+    float y = lerp(start.y, end.y, amt);
+    float z = lerp(start.z, end.z, amt);
+
+    pos = new PVector(x, y, z);
+    amt += vel;
+    if (amt > 1) {
+      amt = 0;
+    }
+  }
+
+  void draw() {
+    pushMatrix();
+    translate(pos.x, pos.y, pos.z);
+    scale(1/sin(frameCount*0.01));  // fix box's size
+    box(boxSize);
+    popMatrix();
+  }
+}
+
+
+class Line {
+  PVector start, end;
+  Box[] boxes= new Box[boxesPerLine];
+
+  Line(PVector start, PVector end) {
+    this.start = new PVector(start.x, start.y, start.z);
+    this.end = new PVector(end.x, end.y, end.z);
+
+    // setup boxes
+    for (int i=0; i<boxes.length; i++) {
+      boxes[i] = new Box();
+    }
+  }
+
+  void draw() {
+    for (Box b : boxes) {
+      b.update(start, end);
+      b.draw();
+    }
+  }
+}
diff --git a/week2/homework/shapes/shapes.rar b/week2/homework/shapes/shapes.rar
new file mode 100644
index 0000000..26fd5e6
Binary files /dev/null and b/week2/homework/shapes/shapes.rar differ
diff --git a/week2/homework/shapes/shapes/Box.pde b/week2/homework/shapes/shapes/Box.pde
new file mode 100644
index 0000000..2a0aa29
--- /dev/null
+++ b/week2/homework/shapes/shapes/Box.pde
@@ -0,0 +1,15 @@
+class Box {
+  float x, y, z;
+
+  Box(float _x, float _y, float _z) {
+    x=_x;
+    y=_y;
+    z=_z;
+  }
+  void draw() {
+    pushMatrix();
+    translate(x, y, z);
+    box(10);
+    popMatrix();
+  }
+}
diff --git a/week2/homework/shapes/shapes/Line.pde b/week2/homework/shapes/shapes/Line.pde
new file mode 100644
index 0000000..151865e
--- /dev/null
+++ b/week2/homework/shapes/shapes/Line.pde
@@ -0,0 +1,36 @@
+class Line {
+  PVector begin, end;
+  int boxNum=10;
+  ArrayList<Box> boxes=new ArrayList<Box>();
+  float[] pos;
+  float amt=0;
+
+
+  Line(PVector begin, PVector end, float[] pos) {
+    this. begin=begin;
+    this. end=end;
+    this.pos=pos;
+    for (int i=0; i<boxNum; i++) {
+
+      float x=lerp(begin.x, end.x, pos[i]);
+      float y=lerp(begin.y, end.y, pos[i]);
+      float z=lerp(begin.z, end.z, pos[i]);
+      boxes.add(new Box(x, y, z));
+    }
+  }
+
+  void draw() {
+
+    for (int i=0; i<boxNum; i++) {
+      Box b=boxes.get(i);
+      float newAmt=(pos[i]+(i+1)*0.05*amt)%1;
+      float newX=lerp(begin.x, end.x, newAmt);
+      b.x=newX;
+      b.draw();
+      println(b.x);
+    }
+    
+    println("          ");
+    amt+=0.01; 
+  }
+}
diff --git a/week2/homework/shapes/shapes/line.gif b/week2/homework/shapes/shapes/line.gif
new file mode 100644
index 0000000..f131342
Binary files /dev/null and b/week2/homework/shapes/shapes/line.gif differ
diff --git a/week2/homework/shapes/shapes/readme.md b/week2/homework/shapes/shapes/readme.md
new file mode 100644
index 0000000..130fb02
--- /dev/null
+++ b/week2/homework/shapes/shapes/readme.md
@@ -0,0 +1,32 @@
+# Shapes
+
+The idea is to create something like this:
+
+![final](https://raw.githubusercontent.com/whg/DfPaI/master/week2/homework/shapes/shapes.gif)
+
+
+Don't worry if you don't get to the final result. There are following stages that you should move through before there.
+
+### Boxes along a line
+
+First make a line of boxes that move along like this:
+
+![line](https://raw.githubusercontent.com/whg/DfPaI/master/week2/homework/shapes/line.gif)
+
+#### Tips
+
+Create a `Box` class that represents a box. This should know the start and stop postions and keep track of where it is between the two points. Use `lerp()` to move the box between the two points by increasing the `amt` parameter. You know when the box has got to the end because `amt` will be >= 0, so when that happens move the the box to the beginning and keep it moving.
+
+Create a `Line` class to represent a line. This should have a start and end `PVector` and an array (or `ArrayList`) of `Box`es.
+
+### Icosahedron
+
+Check out the Wikipedia entry for an [Icosahedron](https://en.wikipedia.org/wiki/Regular_icosahedron) to get the coordinates. Make an `ArrayList` of `Line`s to hold all the lines.
+
+
+### Animating
+
+* Rotate in both the x and y axes.
+* Use `sin()` to set the the overall size of the shape. You can use `scale()` for this, or if you want do do it manually and keep the sizes of the `box`es constant, you can multiply the position yourself. (Create a parameter to the `draw()` function of `Box` so you can scale on the fly).
+* Create another `ArrayList` of `Line`s to hold a cube.
+* Keep track of the scaling factor, when it crosses 0, swap the shapes!
diff --git a/week2/homework/shapes/shapes/shapes.gif b/week2/homework/shapes/shapes/shapes.gif
new file mode 100644
index 0000000..0f526c2
Binary files /dev/null and b/week2/homework/shapes/shapes/shapes.gif differ
diff --git a/week2/homework/shapes/shapes/shapes.pde b/week2/homework/shapes/shapes/shapes.pde
new file mode 100644
index 0000000..30ccffd
--- /dev/null
+++ b/week2/homework/shapes/shapes/shapes.pde
@@ -0,0 +1,24 @@
+PVector beginLine, endLine;
+Line lines;
+int boxNum=10;
+float[] pos=new float[boxNum];
+
+void setup() {
+  size(500, 500, P3D);
+  noStroke();
+  fill(250, 50);
+  blendMode(ADD);
+  //frameRate(1);
+   for (int i=0; i<boxNum; i++) {
+      pos[i]=random(1);
+    }
+  beginLine=new PVector(0, height/2, 0);
+  endLine=new PVector(width, height/2, 0);
+  lines=new Line(beginLine, endLine,pos);
+}
+
+void draw() {
+  background(30);
+  lines.draw();
+  
+}
diff --git a/week2/homework/shapes/shapes_1/Box.pde b/week2/homework/shapes/shapes_1/Box.pde
new file mode 100644
index 0000000..2a0aa29
--- /dev/null
+++ b/week2/homework/shapes/shapes_1/Box.pde
@@ -0,0 +1,15 @@
+class Box {
+  float x, y, z;
+
+  Box(float _x, float _y, float _z) {
+    x=_x;
+    y=_y;
+    z=_z;
+  }
+  void draw() {
+    pushMatrix();
+    translate(x, y, z);
+    box(10);
+    popMatrix();
+  }
+}
diff --git a/week2/homework/shapes/shapes_1/Line.pde b/week2/homework/shapes/shapes_1/Line.pde
new file mode 100644
index 0000000..151865e
--- /dev/null
+++ b/week2/homework/shapes/shapes_1/Line.pde
@@ -0,0 +1,36 @@
+class Line {
+  PVector begin, end;
+  int boxNum=10;
+  ArrayList<Box> boxes=new ArrayList<Box>();
+  float[] pos;
+  float amt=0;
+
+
+  Line(PVector begin, PVector end, float[] pos) {
+    this. begin=begin;
+    this. end=end;
+    this.pos=pos;
+    for (int i=0; i<boxNum; i++) {
+
+      float x=lerp(begin.x, end.x, pos[i]);
+      float y=lerp(begin.y, end.y, pos[i]);
+      float z=lerp(begin.z, end.z, pos[i]);
+      boxes.add(new Box(x, y, z));
+    }
+  }
+
+  void draw() {
+
+    for (int i=0; i<boxNum; i++) {
+      Box b=boxes.get(i);
+      float newAmt=(pos[i]+(i+1)*0.05*amt)%1;
+      float newX=lerp(begin.x, end.x, newAmt);
+      b.x=newX;
+      b.draw();
+      println(b.x);
+    }
+    
+    println("          ");
+    amt+=0.01; 
+  }
+}
diff --git a/week2/homework/shapes/shapes_1/line.gif b/week2/homework/shapes/shapes_1/line.gif
new file mode 100644
index 0000000..f131342
Binary files /dev/null and b/week2/homework/shapes/shapes_1/line.gif differ
diff --git a/week2/homework/shapes/shapes_1/readme.md b/week2/homework/shapes/shapes_1/readme.md
new file mode 100644
index 0000000..130fb02
--- /dev/null
+++ b/week2/homework/shapes/shapes_1/readme.md
@@ -0,0 +1,32 @@
+# Shapes
+
+The idea is to create something like this:
+
+![final](https://raw.githubusercontent.com/whg/DfPaI/master/week2/homework/shapes/shapes.gif)
+
+
+Don't worry if you don't get to the final result. There are following stages that you should move through before there.
+
+### Boxes along a line
+
+First make a line of boxes that move along like this:
+
+![line](https://raw.githubusercontent.com/whg/DfPaI/master/week2/homework/shapes/line.gif)
+
+#### Tips
+
+Create a `Box` class that represents a box. This should know the start and stop postions and keep track of where it is between the two points. Use `lerp()` to move the box between the two points by increasing the `amt` parameter. You know when the box has got to the end because `amt` will be >= 0, so when that happens move the the box to the beginning and keep it moving.
+
+Create a `Line` class to represent a line. This should have a start and end `PVector` and an array (or `ArrayList`) of `Box`es.
+
+### Icosahedron
+
+Check out the Wikipedia entry for an [Icosahedron](https://en.wikipedia.org/wiki/Regular_icosahedron) to get the coordinates. Make an `ArrayList` of `Line`s to hold all the lines.
+
+
+### Animating
+
+* Rotate in both the x and y axes.
+* Use `sin()` to set the the overall size of the shape. You can use `scale()` for this, or if you want do do it manually and keep the sizes of the `box`es constant, you can multiply the position yourself. (Create a parameter to the `draw()` function of `Box` so you can scale on the fly).
+* Create another `ArrayList` of `Line`s to hold a cube.
+* Keep track of the scaling factor, when it crosses 0, swap the shapes!
diff --git a/week2/homework/shapes/shapes_1/shapes.gif b/week2/homework/shapes/shapes_1/shapes.gif
new file mode 100644
index 0000000..0f526c2
Binary files /dev/null and b/week2/homework/shapes/shapes_1/shapes.gif differ
diff --git a/week2/homework/shapes/shapes_1/shapes.pde b/week2/homework/shapes/shapes_1/shapes.pde
new file mode 100644
index 0000000..30ccffd
--- /dev/null
+++ b/week2/homework/shapes/shapes_1/shapes.pde
@@ -0,0 +1,24 @@
+PVector beginLine, endLine;
+Line lines;
+int boxNum=10;
+float[] pos=new float[boxNum];
+
+void setup() {
+  size(500, 500, P3D);
+  noStroke();
+  fill(250, 50);
+  blendMode(ADD);
+  //frameRate(1);
+   for (int i=0; i<boxNum; i++) {
+      pos[i]=random(1);
+    }
+  beginLine=new PVector(0, height/2, 0);
+  endLine=new PVector(width, height/2, 0);
+  lines=new Line(beginLine, endLine,pos);
+}
+
+void draw() {
+  background(30);
+  lines.draw();
+  
+}
diff --git a/week2/homework/triangles/.DS_Store b/week2/homework/triangles/.DS_Store
new file mode 100644
index 0000000..5008ddf
Binary files /dev/null and b/week2/homework/triangles/.DS_Store differ
diff --git a/week2/homework/triangles/W_Tang_WK02atan_triangle.pde b/week2/homework/triangles/W_Tang_WK02atan_triangle.pde
new file mode 100644
index 0000000..606a38b
--- /dev/null
+++ b/week2/homework/triangles/W_Tang_WK02atan_triangle.pde
@@ -0,0 +1,53 @@
+class Triangle {
+  PVector pos;
+  float rotation;
+
+  Triangle(float x, float y) {
+    pos = new PVector(x, y);
+    rotation = 0;
+  }
+  void triangledraw() {
+    stroke(255);
+    noFill();
+    strokeWeight(1);
+// define triangle activation
+    pushMatrix();
+    translate(pos.x, pos.y);
+    
+    rotate(rotation+ PI/2);
+
+    scale(2, 2);
+    triangle(-5, 2, 5, 2, 0, -10);
+    popMatrix();
+    }
+    // define triangle direction 
+    void faceToward(float x, float y){
+     float a = atan2(y-pos.y, x-pos.x);
+      rotation = a;
+    }
+    
+    
+    
+    
+  
+}
+ArrayList<Triangle> friends = new ArrayList<Triangle>();
+void setup() {
+  size(800, 800);
+// set up postion
+  int N = 10;
+  int spacing = width / (N + 1);
+  for (int i = 0; i < N; i++) {
+    for (int j = 0; j < N; j++) {
+      friends.add(new Triangle( i * spacing + spacing, j * spacing + spacing ));
+    }
+  }
+}
+void draw() {
+  background(0);
+  //get message from class
+  for (Triangle t : friends) {
+    t.faceToward(mouseX,mouseY);
+    t.triangledraw();
+  }
+}
diff --git a/week2/homework/triangles/atan_triangle.pde b/week2/homework/triangles/atan_triangle.pde
new file mode 100644
index 0000000..a155c22
--- /dev/null
+++ b/week2/homework/triangles/atan_triangle.pde
@@ -0,0 +1,51 @@
+class Triangle {
+  PVector pos;
+  float rotation;
+
+  Triangle(float x, float y) {
+    pos = new PVector(x, y);
+    rotation = 0;
+  }
+  void triangledraw() {
+    stroke(255);
+    noFill();
+    strokeWeight(1);
+
+    pushMatrix();
+    translate(pos.x, pos.y);
+    
+    rotate(rotation+ PI/2);
+
+    scale(2, 2);
+    triangle(-5, 2, 5, 2, 0, -10);
+    popMatrix();
+    }
+    void faceToward(float x, float y){
+     float a = atan2(y-pos.y, x-pos.x);
+      rotation = a;
+    }
+    
+    
+    
+    
+  
+}
+ArrayList<Triangle> friends = new ArrayList<Triangle>();
+void setup() {
+  size(500, 500);
+
+  int N = 10;
+  int spacing = width / (N + 1);
+  for (int i = 0; i < N; i++) {
+    for (int j = 0; j < N; j++) {
+      friends.add(new Triangle( i * spacing + spacing, j * spacing + spacing ));
+    }
+  }
+}
+void draw() {
+  background(0);
+  for (Triangle t : friends) {
+    t.faceToward(mouseX,mouseY);
+    t.triangledraw();
+  }
+}
diff --git a/week2/sketches/.DS_Store b/week2/sketches/.DS_Store
new file mode 100644
index 0000000..230ef69
Binary files /dev/null and b/week2/sketches/.DS_Store differ
diff --git a/week3/.DS_Store b/week3/.DS_Store
new file mode 100644
index 0000000..1454c50
Binary files /dev/null and b/week3/.DS_Store differ
diff --git a/week3/homework/.DS_Store b/week3/homework/.DS_Store
new file mode 100644
index 0000000..d882ca7
Binary files /dev/null and b/week3/homework/.DS_Store differ
diff --git a/week3/homework/ascii/W_Tang_WK03_ascii.py b/week3/homework/ascii/W_Tang_WK03_ascii.py
new file mode 100644
index 0000000..0421ef7
--- /dev/null
+++ b/week3/homework/ascii/W_Tang_WK03_ascii.py
@@ -0,0 +1,44 @@
+from PIL import Image
+import sys
+
+
+
+ASCII_CHARS = ['!',',',':',';','+','*','?','%','S','#','@']
+ASCII_CHARS = ASCII_CHARS[::-1]
+
+
+
+def resize(image, new_width=50):
+    (old_width, old_height) = image.size
+    aspect_ratio = float(old_height)/float(old_width)
+    new_height = int(aspect_ratio * new_width)
+    new_dim = (new_width, new_height)
+    new_image = image.resize(new_dim)
+    return new_image
+
+
+def grayscalify(image):
+    return image.convert('L')
+
+
+def modify(image, buckets=25):
+    initial_pixels = list(image.getdata())
+    new_pixels = [ASCII_CHARS[pixel_value//buckets] for pixel_value in initial_pixels]
+    return ''.join(new_pixels)
+
+def do(image, new_width=100):
+    image = resize(image)
+    image = grayscalify(image)
+
+    pixels = modify(image)
+    ##len
+    len_pixels = len(pixels)
+
+    new_image = [pixels[index:index+new_width] for index in range(0, len_pixels, new_width)]
+
+    return '\n'.join(new_image)
+
+
+image = Image.open("amy_1.png")
+image = do(image)
+print(image)
diff --git a/week3/homework/ascii/amy_1.png b/week3/homework/ascii/amy_1.png
new file mode 100644
index 0000000..302a99f
Binary files /dev/null and b/week3/homework/ascii/amy_1.png differ
diff --git a/week3/homework/pixelate/W_Tang_WK03_pixelate.pde b/week3/homework/pixelate/W_Tang_WK03_pixelate.pde
new file mode 100644
index 0000000..8c33f76
--- /dev/null
+++ b/week3/homework/pixelate/W_Tang_WK03_pixelate.pde
@@ -0,0 +1,32 @@
+PImage img;
+int pixelate = 20;
+
+void setup() {
+  size(500, 500);
+  img = loadImage("hand.jpg");
+  background(0);
+
+}
+
+void draw() {
+
+  for (int x = 0; x < img.width; x += pixelate) {
+    for (int y = 0; y < img.height; y += pixelate) {
+      int loc = x + y*img.width;
+
+
+
+      // Look up the RGB color in the source image
+      loadPixels();
+      float r = red(img.pixels[loc]);
+      float g = green(img.pixels[loc]);
+      float b = blue(img.pixels[loc]);
+      updatePixels();
+
+      // Draw an square at that location with that color
+      noStroke();
+      fill(r, g, b);
+      rect(x, y, pixelate, pixelate);
+    }
+  }
+}
diff --git a/week3/homework/tube-stops/.DS_Store b/week3/homework/tube-stops/.DS_Store
new file mode 100644
index 0000000..8cc2c64
Binary files /dev/null and b/week3/homework/tube-stops/.DS_Store differ
diff --git a/week3/homework/tube-stops/TubeReceiver/W_Tang_WK03_TubeReceiver/W_Tang_WK03_TubeReceiver.pde b/week3/homework/tube-stops/TubeReceiver/W_Tang_WK03_TubeReceiver/W_Tang_WK03_TubeReceiver.pde
new file mode 100644
index 0000000..355f197
--- /dev/null
+++ b/week3/homework/tube-stops/TubeReceiver/W_Tang_WK03_TubeReceiver/W_Tang_WK03_TubeReceiver.pde
@@ -0,0 +1,53 @@
+import oscP5.*;
+
+
+OscP5 oscP5;
+
+// setup from the centre
+float centerLat=51.5074;
+float centerLon=0.1278;
+
+FloatList lats=new FloatList();
+FloatList lons=new FloatList();
+
+
+void setup() {
+  size(1000, 1000);
+  //frameRate(1);
+  oscP5 = new OscP5(this, 12000);
+}
+
+
+void draw() {
+  background(0);
+  if(lats!=null){
+  for (int i=0; i<lats.size(); i++) {
+    
+    float a=lons.get(i);
+    float b=lats.get(i);
+    fill(255);
+    ellipse(a, b, 10, 10);
+    stroke(255,0,0);
+    line(a,b,width/2,10);
+  }
+  
+
+  }
+}
+
+// accept message from python
+void oscEvent(OscMessage theOscMessage) {
+
+// divided message into 2 groups
+  float lat = theOscMessage.get(0).floatValue();
+  float lon = theOscMessage.get(1).floatValue();
+
+// draw in processing
+  float x=width/2+(centerLon+lon)*1000;
+  float y= height/2+(centerLat-lat)*1000;
+
+  lats.append(y);
+  lons.append(x);
+
+  println("   "+lat+"   " + lon);
+}
diff --git a/week3/homework/tube-stops/W_Tang_WK03_getTubeData.py b/week3/homework/tube-stops/W_Tang_WK03_getTubeData.py
new file mode 100644
index 0000000..cb83241
--- /dev/null
+++ b/week3/homework/tube-stops/W_Tang_WK03_getTubeData.py
@@ -0,0 +1,28 @@
+
+#libreray
+import json,urllib.request
+
+
+from pythonosc import udp_client
+
+#Setting up IP, port ( server, client from processing)
+ip, port = '127.0.0.1', 12000 # server address
+
+# server address get from lirbreray
+client = udp_client.SimpleUDPClient(ip, port)
+
+data = urllib.request.urlopen("http://fezz.in/whg/projects/data/tube-stops.json").read()
+
+# get data from Json file
+output = json.loads(data)
+
+#keys represents "XXXXXXXXl": { format
+keys =[]
+for key in output.keys():
+
+    lat = output[key]['lat']
+    lon = output[key]['lon']
+    loc = [lat,lon]
+
+    #open processing first, then file can send message at the sametime
+    client.send_message("/lat", loc)
diff --git a/week3/homework/tube-stops/tube-stops/readme.md b/week3/homework/tube-stops/tube-stops/readme.md
new file mode 100644
index 0000000..032513b
--- /dev/null
+++ b/week3/homework/tube-stops/tube-stops/readme.md
@@ -0,0 +1,11 @@
+# Tube stops
+
+The following URL contains a JSON file of the coordinates of all the London Underground stops:
+
+[http://fezz.in/whg/projects/data/tube-stops.json](http://fezz.in/whg/projects/data/tube-stops.json)
+
+Do some or all of the following:
+
+- Write a Python script to download and extract the information you want
+- Send the positions of the stops to a Processing sketch that displays them
+- Or anything else you want to do!
diff --git a/week3/readme.md b/week3/readme.md
index 6d94b14..6aa4353 100644
--- a/week3/readme.md
+++ b/week3/readme.md
@@ -4,7 +4,7 @@
 
 ### Basic Commands
 
-* `cd` moves folders, e.g. `cd Documents`
+* `cd` moves folder s, e.g. `cd Documents`
 * `ls` lists contents of folder 
 * `pwd` prints working directory, i.e. the folder path that we're in
 
diff --git a/week4/homework/craters/.DS_Store b/week4/homework/craters/.DS_Store
new file mode 100644
index 0000000..284d4fd
Binary files /dev/null and b/week4/homework/craters/.DS_Store differ
diff --git a/week4/homework/craters/W_Tang_WK03craters/.DS_Store b/week4/homework/craters/W_Tang_WK03craters/.DS_Store
new file mode 100644
index 0000000..5008ddf
Binary files /dev/null and b/week4/homework/craters/W_Tang_WK03craters/.DS_Store differ
diff --git a/week4/homework/craters/W_Tang_WK03craters/W_Tang_WK04_craters.pde b/week4/homework/craters/W_Tang_WK03craters/W_Tang_WK04_craters.pde
new file mode 100644
index 0000000..0fd3d91
--- /dev/null
+++ b/week4/homework/craters/W_Tang_WK03craters/W_Tang_WK04_craters.pde
@@ -0,0 +1,36 @@
+import peasy.*;
+
+Table table;
+PeasyCam cam;
+float moonRadius = 1737.31; // in km
+
+ArrayList<MoonCraters> moonCraters=new ArrayList<MoonCraters>();
+
+float lat, lon, dia;
+
+void setup() {
+  size(1920, 1080, P3D);
+  stroke(255);
+  noFill();
+
+  cam = new PeasyCam(this, 6000);
+  table = loadTable("moon_crater_coords.csv", "header");
+
+  for (int i = 0; i < table.getRowCount(); i++) {
+
+    lat = table.getFloat(i, "lat");
+    lon = table.getFloat(i, "lon");
+    dia = table.getFloat(i, "dia");
+    moonCraters.add(new MoonCraters(lat, lon, dia, moonRadius));
+  }
+  //println(moonCraters.size());
+}
+
+void draw() {
+  background(0);
+  
+  // Get data from class
+  for (MoonCraters c : moonCraters) {
+    c.draw();
+  }
+}
diff --git a/week4/homework/craters/W_Tang_WK03craters/moonCraters.pde b/week4/homework/craters/W_Tang_WK03craters/moonCraters.pde
new file mode 100644
index 0000000..931f8d5
--- /dev/null
+++ b/week4/homework/craters/W_Tang_WK03craters/moonCraters.pde
@@ -0,0 +1,29 @@
+class MoonCraters {
+
+  float lat, lon, dia;  
+  float radius;
+  float x, y, z; 
+
+// formula for 'lat', 'lon' and 'dia'
+  MoonCraters(float _lat, float _lon, float _dia,float _radius) {
+    lat=radians(_lat);
+    lon=radians(_lon);
+    dia=_dia;
+    radius=_radius;
+    x=radius*cos(lat)*sin(lon);
+    y=radius*cos(lat)*cos(lon);
+    z=radius*sin(lat);
+  }
+
+  void draw() {
+    
+    pushMatrix();
+    translate(x,y,z);
+    rotateZ(HALF_PI-lon);
+    rotateY(HALF_PI-lat);
+
+    ellipse(0,0,dia,dia);
+    popMatrix();
+    
+  }
+}
diff --git a/week4/homework/craters/W_Tang_WK03craters/moon_crater_coords.csv b/week4/homework/craters/W_Tang_WK03craters/moon_crater_coords.csv
new file mode 100644
index 0000000..9380c29
--- /dev/null
+++ b/week4/homework/craters/W_Tang_WK03craters/moon_crater_coords.csv
@@ -0,0 +1,1570 @@
+lat,lon,dia
+-57.58,174.77,63.98
+5.56,54.74,10.4
+-34.63,85.78,137.35
+-20.99,11.89,43.19
+20.11,27.82,1.6
+0.96,116.63,54.18
+-13.87,13.91,62.23
+-5.65,60.14,13.06
+-31.89,68.39,63.27
+87.96,-109.69,16.74
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diff --git a/week4/homework/craters/moon-craters.py b/week4/homework/craters/moon-craters.py
index 86e6fee..774868e 100644
--- a/week4/homework/craters/moon-craters.py
+++ b/week4/homework/craters/moon-craters.py
@@ -14,27 +14,49 @@
 
 parser = etree.HTMLParser()
 
+# return coordinate
 def get_coords(url):
     res = requests.get(url)
 
     tree = etree.fromstring(res.text, parser)
     coords = tree.xpath('//span[@class="geo"]/text()')
 
+
     return coords
 
+# diameter
+def get_dia(url):
+    res = requests.get(url)
+
+    tree = etree.fromstring(res.text, parser)
+
+    dia = tree.xpath('//tbody[1]/tr/td[3]/text()')
+
+    return dia
 
+# get data from the url
 all_coords = []
+all_dia =[]
 for url in urls:
     coords = get_coords(url)
+    dia=get_dia(url)
     all_coords += coords
+    all_dia += dia
     #  ^ this is the same as all_coords.extend(coords)
 
     print('added {} coords'.format(len(coords)))
 
 print('total of {}'.format(len(all_coords)))
 
+
+i=0
 with open('moon_crater_coords.csv', 'w') as f:
-    f.write('lat,lon\n')
+    # add dia
+    f.write('lat,lon,dia\n')
     for coord in all_coords:
         lat, lon = coord.split('; ')
-        f.write('{},{}\n'.format(lat, lon))
+        
+        dia = all_dia[i]
+
+        f.write('{},{},{}\n'.format(lat, lon,dia))
+        i+=1
diff --git a/week4/homework/gui/.DS_Store b/week4/homework/gui/.DS_Store
new file mode 100644
index 0000000..d75fb4f
Binary files /dev/null and b/week4/homework/gui/.DS_Store differ
diff --git a/week4/homework/gui/1.jpg b/week4/homework/gui/1.jpg
new file mode 100644
index 0000000..b51b8a5
Binary files /dev/null and b/week4/homework/gui/1.jpg differ
diff --git a/week4/homework/gui/slider/.DS_Store b/week4/homework/gui/slider/.DS_Store
new file mode 100644
index 0000000..c11dfb9
Binary files /dev/null and b/week4/homework/gui/slider/.DS_Store differ
diff --git a/week4/homework/gui/slider/sketch_1_1/.DS_Store b/week4/homework/gui/slider/sketch_1_1/.DS_Store
new file mode 100644
index 0000000..013a799
Binary files /dev/null and b/week4/homework/gui/slider/sketch_1_1/.DS_Store differ
diff --git a/week4/homework/gui/slider/sketch_1_1/data/1.jpg b/week4/homework/gui/slider/sketch_1_1/data/1.jpg
new file mode 100644
index 0000000..b51b8a5
Binary files /dev/null and b/week4/homework/gui/slider/sketch_1_1/data/1.jpg differ
diff --git a/week4/homework/gui/slider/sketch_1_1/sketch_1_1.pde b/week4/homework/gui/slider/sketch_1_1/sketch_1_1.pde
new file mode 100644
index 0000000..0c8d8aa
--- /dev/null
+++ b/week4/homework/gui/slider/sketch_1_1/sketch_1_1.pde
@@ -0,0 +1,20 @@
+PImage sample;
+int x, y;
+ 
+void setup() {
+  size(1000, 600); 
+  noStroke(); 
+  sample=loadImage("1.jpg");
+  x=0;
+  y=400;
+}
+ 
+void draw() { 
+  background(255); 
+  image(sample, x, y, 50, 30);
+}
+ 
+void mouseDragged() { 
+  x=mouseX; 
+  y=mouseY;
+}
diff --git a/week4/homework/gui/slider/slider/W_Tang_WK04slider.pde b/week4/homework/gui/slider/slider/W_Tang_WK04slider.pde
new file mode 100644
index 0000000..89023d9
--- /dev/null
+++ b/week4/homework/gui/slider/slider/W_Tang_WK04slider.pde
@@ -0,0 +1,58 @@
+import controlP5.*;
+
+ControlP5 cp5;
+int myColor = color(0, 0, 0);
+int sliderValue = 100;
+int sliderValue2 = 100;
+int sliderValue3 = 100;
+int r, g, b;
+float x ;
+float y ;
+
+float speedx = 1;
+float speedy = 1;
+
+float dia = 25;
+
+void setup() {
+  size(700, 400);
+  noStroke();
+
+  x = width/2;
+  y = height/2;
+  cp5 = new ControlP5(this);
+    cp5.enableShortcuts();
+  //slider();
+  // to variable 'sliderValue'
+  
+    cp5.addSlider("sliderValue")
+    .setPosition(x, y)
+    .setSize(200, 20)
+    .setRange(0, 255)
+    .setValue(100);
+
+  cp5.addSlider("sliderValue2")
+    .setPosition(x, y+20)
+    .setSize(200, 20)
+    .setRange(0, 200)
+    .setValue(120);
+
+  cp5.addSlider("sliderValue3")
+    .setPosition(x, y+40)
+    .setSize(200, 20)
+    .setRange(0, 100)
+    .setValue(160);
+}
+
+
+void draw() {
+
+
+  background(r, g, b);
+  r = sliderValue;
+  g = sliderValue2;
+  b = sliderValue3;
+
+  fill(255, 0, 120);  
+  rect(x, y-10, 200, 10);
+}
diff --git a/week4/homework/gui/slider/slider/slider.pde b/week4/homework/gui/slider/slider/slider.pde
new file mode 100644
index 0000000..89023d9
--- /dev/null
+++ b/week4/homework/gui/slider/slider/slider.pde
@@ -0,0 +1,58 @@
+import controlP5.*;
+
+ControlP5 cp5;
+int myColor = color(0, 0, 0);
+int sliderValue = 100;
+int sliderValue2 = 100;
+int sliderValue3 = 100;
+int r, g, b;
+float x ;
+float y ;
+
+float speedx = 1;
+float speedy = 1;
+
+float dia = 25;
+
+void setup() {
+  size(700, 400);
+  noStroke();
+
+  x = width/2;
+  y = height/2;
+  cp5 = new ControlP5(this);
+    cp5.enableShortcuts();
+  //slider();
+  // to variable 'sliderValue'
+  
+    cp5.addSlider("sliderValue")
+    .setPosition(x, y)
+    .setSize(200, 20)
+    .setRange(0, 255)
+    .setValue(100);
+
+  cp5.addSlider("sliderValue2")
+    .setPosition(x, y+20)
+    .setSize(200, 20)
+    .setRange(0, 200)
+    .setValue(120);
+
+  cp5.addSlider("sliderValue3")
+    .setPosition(x, y+40)
+    .setSize(200, 20)
+    .setRange(0, 100)
+    .setValue(160);
+}
+
+
+void draw() {
+
+
+  background(r, g, b);
+  r = sliderValue;
+  g = sliderValue2;
+  b = sliderValue3;
+
+  fill(255, 0, 120);  
+  rect(x, y-10, 200, 10);
+}