Flash drawing by pencil automatically

So I am using this tutorial: http://twshot.com/?H9C

But I am trying to accomplish the following:
• Animate the pencil within the timeline to start drawing by itself.
• Allow a user to interfere with the animation(automatic drawing) and draw themselves like it is now but instead of having to click they just need to rollover the movie.

I really haven’t been able to accomplish anything and was wondering if someone could take a look and help me out.