the HYPE Framework / Joshua Davis

import hype.*;
import hype.extended.behavior.HSwarm;
import hype.extended.behavior.HTimer;
import hype.extended.colorist.HPixelColorist;

HPixelColorist colors;
HSwarm     swarm;
HDrawablePool pool;
HTimer     timer;

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

 colors = new HPixelColorist("sintra.jpg").fillOnly();

 swarm = new HSwarm()
  .addGoal(H.mouse())
  .speed(5)
  .turnEase(0.05f)
  .twitch(20)
 ;

 pool = new HDrawablePool(40);
 pool.autoAddToStage()
  .add(new HRect().rounding(4))
  .onCreate(
   new HCallback() {
    public void run(Object obj) {
     HDrawable d = (HDrawable) obj;
     d
      .noStroke()
      .fill(#000000)
      .size((int)random(10,20), (int)random(2,6) )
      .loc(width/2, height/2)
      .anchorAt(H.CENTER)
     ;

     colors.applyColor(d);

     swarm.addTarget(d);
    }
   }
  )
 ;

 timer = new HTimer()
  .numCycles( pool.numActive() )
  .interval(250)
  .callback(
   new HCallback() {
    public void run(Object obj) {
     pool.request();
    }
   }
  )
 ;
}

void draw() {
 for(HDrawable d : pool) {
  colors.applyColor(d.alpha(50));
 }

 H.drawStage();
}