Image image = assets().getImage("images/spritesheet.png");
image.addCallback(new Callback<Image>() {
public void onSuccess (Image image) {
SimpleFrames frames = new SimpleFrames(image, 60, 60, 60);
anim.repeat(box).flipbook(box, new Flipbook(frames, 66));
anim.repeat(box).tweenX(box).to(width-frames.width()).in(2000).easeInOut().then().
tweenX(box).to(0).in(2000).easeInOut();
}
public void onFailure (Throwable error) {} // n/a
});