How do I make text go around like a ticker tape line display?

I've done some Motion tutorials and am stating to get it but need a fast forward bit of help.
Can someone give a hint as to how I can get text to crawl continuously in from the left of a clip, out of the right side and back in from the left again?
Hopefully,
Patrick:unsure:

Do you want it to be continuos or, once it goes off it starts again??

Continuous would be good