the HYPE Framework / Joshua Davis

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

HDrawablePool pool;
HPixelColorist colors;
HCanvas    canvas;

void setup() {
 size(640,640,P3D);
 H.init(this).background(#000000).use3D(true);

 colors = new HPixelColorist("gradient.jpg");

 canvas = new HCanvas(P3D).autoClear(true);
 H.add(canvas);

 pool = new HDrawablePool(1000);
 pool.autoParent(canvas)
  .add(new HRect().rounding(10))
  .onCreate(
   new HCallback() {
    public void run(Object obj) {
     int i = pool.currentIndex();

     HDrawable d = (HDrawable) obj;
     d
      .noStroke()
      .size( (int)random(40,80) , (int)random(60,80) )
      .loc( (int)random(width), (int)random(height) )
      .anchorAt(H.CENTER)

      .obj("xo", new HOscillator()
       .target(d)
       .property(H.X)
       .relativeVal(d.x())
       .range( -(int)random(5,10) , (int)random(5,10) )
       .speed( random(.005,.2) )
       .freq(10)
       .currentStep(i)
      )

      .obj("ao", new HOscillator()
       .target(d)
       .property(H.ALPHA)
       .range(50,255)
       .speed( random(.3,.9) )
       .freq(5)
       .currentStep(i)
      )

      .obj("wo", new HOscillator()
       .target(d)
       .property(H.WIDTH)
       .range(-d.width(),d.width())
       .speed( random(.05,.2) )
       .freq(10)
       .currentStep(i)
      )

      .obj("ro", new HOscillator()
       .target(d)
       .property(H.ROTATION)
       .range(-180,180)
       .speed( random(.005,.05) )
       .freq(10)
       .currentStep(i)
      )

      .obj("zo", new HOscillator()
       .target(d)
       .property(H.Z)
       .range( -400 , 400 )
       .speed( random(.005,.01) )
       .freq(15)
       .currentStep(i*5)
      )
     ;
    }
   }
  )

  .onRequest(
   new HCallback() {
    public void run(Object obj) {
     HDrawable d = (HDrawable) obj;
     d.scale(1).alpha(0).loc((int)random(width),(int)random(height),-(int)random(200));

     HOscillator xo = (HOscillator) d.obj("xo"); xo.register();
     HOscillator ao = (HOscillator) d.obj("ao"); ao.register();
     HOscillator wo = (HOscillator) d.obj("wo"); wo.register();
     HOscillator ro = (HOscillator) d.obj("ro"); ro.register();
     HOscillator zo = (HOscillator) d.obj("zo"); zo.register();
    }
   }
  )

  .onRelease(
   new HCallback() {
    public void run(Object obj) {
     HDrawable d = (HDrawable) obj;

     HOscillator xo = (HOscillator) d.obj("xo"); xo.unregister();
     HOscillator ao = (HOscillator) d.obj("ao"); ao.unregister();
     HOscillator wo = (HOscillator) d.obj("wo"); wo.unregister();
     HOscillator ro = (HOscillator) d.obj("ro"); ro.unregister();
     HOscillator zo = (HOscillator) d.obj("zo"); zo.unregister();
    }
   }
  )
 ;

 new HTimer(50)
  .callback(
   new HCallback() {
    public void run(Object obj) {
     pool.request();
    }
   }
  )
 ;
}

void draw() {
 for(HDrawable d : pool) {
  d.loc( d.x(), d.y() - random(0.25,1), d.z() );

  d.noStroke();
  d.fill(colors.getColor(d.x(), d.y()));

  if (d.z() > -10 && d.z() < 10) d.fill(#FFFFCC); // if the z axis hits this range, change fill to light yellow
  if (d.y() < -40) pool.release(d);
 }

 H.drawStage();
}