int cnt;

void setup() {
  size(400,400);
  background(100,160,200);
  framerate(10);
  smooth();
  ellipseMode(CENTER_DIAMETER);
  cnt=0;
  noStroke();
}

void loop() {
  if(cnt==100) {
    background(100,160,200);
    cnt=0;
  }
  if(random(100)>50) fill(50,80,160);
  else if(random(100)>50) fill(200,170,0);
  else fill(200,255,0);
  drawCircle(random(width),random(height),random(20,100));
  cnt++;
}

void drawCircle(float x,float y,float rad) {
  push();
  translate(x,y);
  ellipse(0,0, rad,rad);
  rotate(random(PI));
  for(int i=0; i<5; i++) {
    ellipse(rad/2,0, rad/5,rad/5);
    rotate(2*PI/5);
  }
  pop();
}