void setup(){
  size(400,400); 
  frameRate(5);
  strokeWeight(1);
  smooth();
  background(0);
}

void draw(){
  background(0);

  ball l=new ball();
  l.drawMe();

}
class ball{
  
  float a = random(height);
  float b = random(width);
 
  void drawMe() {
  background(0);
  fill(200,40,200);
  ellipse(50+a, b, 50,50);
  fill(255, 253, 110);
  ellipse(100+b,a , 60, 60);
  fill(160,100,250);
  rect( b, a, 40,40);
}
}