Well I don't know if active desktop works in Litestep or if it's a function of explorer, but if it works you could use it to put a gif or flash animation of the wormhole where you wanted it. Otherwise you could probably use a label with a gif on it I suspect. I don't really know how labels work, but surely you could do something like that, and make it not always on top, or even have some script that ensures it is always on the bottom so it seems to be part of the desktop.