[Basic Processing -Skectch]

basicProcessing.java

Round[] R = new Round[5];
int circleWidth = 15;
int circleHeight = 15; 
int counter = 0;
void setup() {  
  background(55);
  size(1200,600);
  for(int i = 0; i < 5; i++) {
          
        R[i] = new Round();
        R[i].posx = int(width / 2);
        R[i].posy = int(height /2);
        R[i].cwidth= circleWidth;
        R[i].cheight = circleHeight;
        R[i].update();
  }


}
void draw() {
 
    background(55);
    
   for(int i = 0; i < 5; i++) {
     //R[i].changeColor(int(random(255)), int(random(255)), int(random(255)));
     
     R[i].move(width/ 2, height / int(random(counter)));
   }
   counter++;
}

class Round {
  public int posx;
  public int posy;
  public int colour;
  public int cwidth;
  public int cheight;
  public int R;
  public int G;
  public int B;
  
  // a method for moving the rectangle
  public void move(int x, int y) {
        this.posx = x;
        this.posy = y;
        this.update();
  }
  
  public void update() {
    noStroke(); 
    fill(this.R, this.G, this.B);
    ellipse(this.posx, this.posy, this.cwidth,this.cheight);
    
  }
  
  public void changeColor(int Rx, int Gx, int Bx) {
      this.R = Rx;
      this.G = Gx;
      this.B = Bx;
  }
  
  public void changeShape(int cw, int ch) {
     this.cwidth = cw;
     this.cheight = ch;
     this.update();
  }
}