Homework 3 bounce form Mei~

sketch186943
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float circle_x =200;
float circle_y =100;
float circle_a=200;
float circle_b=300;
int height=400;
int width=400;
​
void setup() {
  size(400, 400);
}
​
void draw() {
  background(0);
  fill(255);
  rect(30, 30, 340, 340);
​
  
  fill(random(255),random(255),random(255));
  rect(30, 30,70, 70);
  fill(255);
  rect(30, 30, 40, 40);
  
  fill(random(255),random(255),random(255));
  rect(300, 30,70, 70);
  fill(255);
  rect(330, 30, 40, 40);
  
  fill(random(255),random(255),random(255));
  rect(30, 300,70, 70);
  fill(255);
  rect(30, 330, 40, 40);
  
  fill(random(255),random(255),random(255));
  rect(300, 300,70, 70);
  fill(255);
  rect(330, 330, 40, 40);
 
  
  fill(random(255),random(255),random(255));
  quad(200,0,0,200,200,400,400,200);
  fill(random(255),random(255),random(255));
  rect(50,50,300,300);
  fill(255);
  quad(200, 30, 30, 200, 200,370,370, 200);
  fill(random(255),random(255),random(255));
  quad(200, 130, 130, 200, 200,270,270, 200);
  fill(255);
  rect(165, 165, 70, 70);
  fill(random(255),random(255),random(255));
  quad(200, 165, 165, 200, 200,235,235, 200);
  fill(random(255),random(255),random(255));
  noStroke();
  circle_x=circle_x-1;
  circle_y=circle_y+1;
  ellipse(circle_x, circle_y, 35, 35);
  ellipse(circle_a,circle_b,35,35);
  circle_a=circle_a+1;
  circle_b=circle_b-1;
​
//1
if (circle_x<width/2)
if(circle_y<height/2){
circle_x=circle_x-1;
circle_y=circle_y+1;
}
​
if (circle_a>width/2)
if(circle_b>height/2){
circle_a=circle_a+1;
circle_b=circle_b-1;
}
​
//2
if (circle_x<width/2)
if(circle_y>height/2){
circle_x=circle_x+4;
  circle_y=circle_y+2;
}  
if (circle_a>width/2)
if(circle_b<height/2){
  circle_a=circle_a-4;
  circle_b=circle_b-2;
}
//3
if (circle_x>width/2)
if(circle_y>height/2){
circle_x=circle_x+4;
  circle_y=circle_y-4;
}  
if (circle_a<width/2)
if(circle_b<height/2){
circle_a=circle_a-4;
circle_b=circle_b+4;
​
​
}
//4
if (circle_x>width/2)
if(circle_y<height/2){
  circle_x=circle_x-2;
  circle_y=circle_y-4;
}
if (circle_a<width/2)
if(circle_b>height/2){
circle_a=circle_a+4;
circle_b=circle_b-2;
}
}
//click
  void mousePressed() {
    circle_x =200; 
    circle_y =100;
    circle_a= 200;
    circle_b=300;
    fill(255);
  }