Auto scrolling text window

Hello, I’m trying to figure out how to get a scrolling text window which scrolls automatically. I have been able to make one that scrolls on a mouse event but I want it to just scroll automatically. It would have to scroll in a loop too. The text is being referenced from an external text file. First of all, is all this even possible? If so, I would greatly appreicate if someone could tell me how or point me to an online tutorial or book that would tell me how.

Thanks,
j