IJ/bin/ij/plugin/RandomOvals.txt

  newImage("Untitled", "RGB", 400, 400, 1);
  width = getWidth();
  height = getHeight();
  for (i=0; i<1000; i++) {
      if (nSlices!=1) exit;
      w = random()*width/2+1;
      h = random()*width/2+1;
      x = random()*width-w/2;
      y = random()*height-h/2;
      setForegroundColor(random()*255, random()*255, random()*255);
      makeOval(x, y, w, h);
      run("Fill");
   }