新建文档,按Ctrl+J修改属性:


然后选中圆按F8转变为影片剪辑元件,在属性面板上命名实例名circle:


然后添加一层,选择第1帧按F9输入如下指令:
_root.onEnterFrame = function(){
positionX = _root._xmouse - 55;
positionY = _root._ymouse - 50;
circle._x = circle._x + (positionX - circle._x)/15
circle._y = circle._y + (positionY - circle._y)/15
}

