Randomly place a bitmap until slide advances.

Hey folks! Nice place you've got here.

I'm hoping you can provide me with some epic VBA that will accomplish the following:

Take a given bitmap, and randomly place it. Leave it on the screen for a few seconds, fade it, randomly place it again, then make it reappear. This should continue until the slide advances. The effect should mimic the screen savers of yore.

I'm guessing it'll be a few random number calls within a loop in the code, one that I can escape either with a mouse click, or advancement to the next frame; I just don't know enough about VBA in powerpoint to make it happen myself.

Thanks in advance!

-K