Track clicks on a game controller

I have a simple game controller graphic (like that of Playstation) that I'd like to program to do things when a certain order of clicks are performed. For example, if a user clicks the four buttons on the controller in this order: left, right, bottom, left, I want the Flash to then take them to a specific URL. Are there any tutorials on how to do this?

I am using Flash CS3, and I'm familiar with Actionscript 2.0, but by no means a AS programming pro.

Thanks!