JavaFX和精灵动画，我如何制作一个动画循环来改变我的播放器精灵的图片？

import javafx.animation.Animation;
import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javafx.util.Duration;

public class SpriteAnimationExample extends Application {

    private static final int SPRITE_WIDTH = 100;
    private static final int SPRITE_HEIGHT = 100;
    private static final int NUM_FRAMES = 4;
    private static final int FRAME_DURATION = 200; // 每帧的持续时间（毫秒）

    private ImageView spriteImageView;
    private int currentFrame = 0;

    @Override
    public void start(Stage primaryStage) {
        // 创建精灵的ImageView
        spriteImageView = new ImageView();
        spriteImageView.setFitWidth(SPRITE_WIDTH);
        spriteImageView.setFitHeight(SPRITE_HEIGHT);

        // 加载精灵的图片
        Image spriteImage = new Image("path/to/sprite.png");
        spriteImageView.setImage(spriteImage);

        // 创建动画循环
        Timeline animation = new Timeline(
                new KeyFrame(Duration.millis(FRAME_DURATION), event -> {
                    // 更新精灵的图片
                    spriteImageView.setViewport(new Rectangle2D(currentFrame * SPRITE_WIDTH, 0, SPRITE_WIDTH, SPRITE_HEIGHT));
                    currentFrame = (currentFrame + 1) % NUM_FRAMES;
                })
        );
        animation.setCycleCount(Animation.INDEFINITE); // 设置循环次数为无限次
        animation.play();

        // 创建场景并显示
        StackPane root = new StackPane(spriteImageView);
        Scene scene = new Scene(root, SPRITE_WIDTH, SPRITE_HEIGHT);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}