emitter.initters.add(Lifespan.constant(5));
emitter.initters.add(Color.constant(0xFF99CCFF));
emitter.initters.add(Transform.layer(emitter.layer));
emitter.initters.add(Velocity.randomSquare(rando, -20, 20, -100, 0));
emitter.effectors.add(new Gravity(30));
emitter.effectors.add(new Move());
emitter.effectors.add(Alpha.byAge(Interpolator.EASE_OUT, 1, 0));
emitter.layer.setTranslation(width()/2, height()/2);
note(emitter);
}