public void addBird() { TextureRegion[] birdRegions = new TextureRegion[] { Atlas.findRegion("bird1"), Atlas.findRegion("bird2"), Atlas.findRegion("bird3") }; bird = new Chim(birdRegions); bird.setPosition(Flappybird.VIEWPORT.x / 2 - bird.getWidth(), Flappybird.VIEWPORT.y / 2); stage.addActor(bird); }