Flash AS3：帧到帧上的补间MC到MC

Question

我正在尝试在Flash CS3中构建一个四帧动画。 背景图像（每个设置为MovieClip）在每个帧上都会发生变化，我想在每个MC上进行淡出/过渡。 我似乎无法让这个工作正常。 这是我的代码：

if (currentFrame == 1) {
    var alphaTweenOut1:Tween = new Tween (image1, "alpha", Regular.easeOut, 100, 0, 1, true);
    var alphaTweenIn2:Tween = new Tween (image2, "alpha", Regular.easeIn, 0, 100, 3, true);
} else if (currentFrame == 2) {
    var alphaTweenOut2:Tween = new Tween (image2, "alpha", Regular.easeOut, 100, 0, 1, true);
    var alphaTweenIn3:Tween = new Tween (image3, "alpha", Regular.easeIn, 0, 100, 3, true);
} else if (currentFrame == 3) {
    var alphaTweenOut3:Tween = new Tween (image3, "alpha", Regular.easeOut, 100, 0, 1, true);
    var alphaTweenIn4:Tween = new Tween (image4, "alpha", Regular.easeIn, 0, 100, 3, true); 
} else {
    var alphaTweenOut4:Tween = new Tween (image4, "alpha", Regular.easeOut, 100, 0, 1, true);       
    var alphaTweenIn1:Tween = new Tween (image1, "alpha", Regular.easeIn, 0, 100, 3, true);
    //loop back to first frame (there is a 5th frame that is triggered on mouse events)
    gotoAndPlay(1);
}