timeline = new Timeline(new KeyFrame(Duration.millis(duration * 1000), e -> {

			// frames.getImageByIndex(index);
			if (index >= frames.getNumberOfFrames()) {
				timeline.stop();
				index = 0;
			} else {

				System.out.println("index: " + index);
				whatToDo();
				index++;
			}

		}));
		timeline.setCycleCount(Animation.INDEFINITE);
		timeline.setAutoReverse(true);