Sketch VI

void setup() {
  size (600,400);
  background (764367563);
}
void draw () {
  stroke (100);
 fill (78,25,123);
 rectMode (CENTER);
  rect (mouseX, mouseY, 30,10);
  fill (12,180,180);
  ellipse ((random(600)),(random(400)),20,20);
}