I envision the concept working like this:
4 text ads in a 4 column table. At a as of yet to be determined interval, I would like the text ads to rotate out and have 4 new text ads rotate in. I'd like to be able to run 5 rotation sets with each containing 4 ads.
If you know of a script available please sticky me. If you can think of a better way of achieving my concept, feel free to suggest another method.