How To: Create a drost effect on an animated GIF in GIMP

Watch and learn how to create a drost effect on images in GIMP. The end result will be a color cycled animated GIF. The theory behind this can be applied to make any other adjustments. Whatever layers you have can be cycled through continuously.
Josh Sommers' Drost tutorial can be found on his awesome Flickr account:
http://www.flickr.com/photos/joshsommers/sets/72157594515046947/