How to do make movieclip follow mouse tween movement?

Hello,

I’m not sure what to call this particular way of making the movieclip follow the mouse.

Here’s an example animation to show what I mean: http://www.swfcabin.com/open/1307994341

When the mouse moves up, the movieclip plays through the frame. If the mouse moves down, the movieclip plays in reverse? I think that’s how it works. Can someone help me with the codes? :slight_smile: