This one creates those ‘loading’ animated gifs you see when you are waiting for things to load on a web page… they don’t really do anything, but they give your visitors something to look at while the page is loading …
You can create your own animated gif’s or you can use one that is already created by other users.
http://blog-well.com/2007/06/17/free-loadingwaiting-animated-loading-gifs/
This site have some nice wating animated gifs