The Infinite Menu by Pom?

I did the tutorial from Pom “The Infinite Menu” wich I enjoyed very much :beer:
What I would like to know is how I create this effect without the mouse behaviour and how do I accomplish it that when the movie reaches it’s destination point [FONT=Courier New]_x=-300 that it reverse (I mean moving in the other direction so it’s moving from right to left and left to right and so on) [/FONT]

[FONT=Courier New]Thank you all in advance[/FONT]