I think, and I could be wrong, that putting a wait(1) at the end of a while loop is just good practice. Personally, after learning it at the end of a while loop, I can't put it any where else. I'm sure someone with more experience will correct me if I'm wrong but having the wait(1) at the beginning technically will be a "wait before they do" rather than "do then wait" but it will only be for a single frame so it won't be noticeable at all, unless the frame rate drops substantially. If worse comes to worse, at least moving a single line to the end of a loop isn't difficult to do