the HYPE Framework / Joshua Davis

import hype.*;
import hype.extended.colorist.HColorPool;
import hype.extended.layout.HShapeLayout;

HDrawablePool pool;

void setup() {
 size(640,640);
 H.init(this).background(#242424);

 HRect hitShape = new HRect(400,320);
 H.add(hitShape).noStroke().fill(#237D26).anchorAt(H.CENTER).locAt(H.CENTER);

 HShapeLayout hsl = new HShapeLayout().target(hitShape);

 pool = new HDrawablePool(200);
 pool.autoAddToStage()
  .add(new HRect().rounding(5))
  .colorist( new HColorPool(#FFFFFF, #F7F7F7, #ECECEC, #333333, #0095a8, #00616f, #FF3300, #FF6600).fillOnly() )
  .layout(hsl)
  .onCreate(
   new HCallback() {
    public void run(Object obj) {
     HDrawable d = (HDrawable) obj;
     d.noStroke().size( 5+((int)random(10)*5) ).anchorAt(H.CENTER).rotation(45);
    }
   }
  )
  .requestAll()
 ;

 H.drawStage();
 noLoop();
}

void draw() {

}