i recall a thread here about it once, i've had a search for it but couldn't find it, i recall another member who found a similar one , i will give him a shout. http://www.crayonroom.com/screensaver.php
actually that was an albumart tile screensaver, maybe this one is more what you are looking for https://github.com/hermanbanken/shiftingtiles
i have no idea how it works or installs???