Sketch III

void setup() {
  size (750,520);
  background (0);
}
void draw () {
  strokeWeight (1);
  smooth (500);
  fill (random(500));
 rectMode (CENTER);
  rect ((random(1200)),(random(1000)),20,20);
  fill (17,180,180,500);
  ellipse
  ((random(1200)),(random(1200)),50,50);
}