效果演示：
具体代码：
onClipEvent (load) {
x=0 //where the dot is
y=0 //where the dot is
xmove=0 //it's movement
ymove=0 //it's movement
}
onClipEvent (enterFrame) {
xmove+= (_root._xmouse-_x-x)/10 //math
ymove+= (_root._ymouse-_y-y)/10 //math
x+=xmove+(_root._xmouse-_x-x)/10 //math
y+=ymove+(_root._ymouse-_y-y)/10 //math
clear()
lineStyle(1,000000,100)
moveTo(oldx,oldy)
lineTo(x,y)
oldx=x //this is so that in the next frame it knows where the dot was last frame
oldy=y //this is so that in the next frame it knows where the dot was last frame
_rotation-- //This is negative on two of the movieclips (that initially have an opposite rotation to eachother), and positive on the other two.
}