Make this into autoscroll

Hello, I am new to flash and slowly learning how to use it. I followed the tutorial below to make a scrolling menu. THe menu moves to the left or right depending on the position of the mouse.

My question is how can I make it so the menu autoscrolls either from left to right or right to left automatically.

Here is the tutorial that I followed.

http://www.kirupa.com/developer/mx/infinite.htm

Thank you.