How to Glitter a File?

Glitch is the art of corrupting files in order to get artistic results from the outcome. Any human readable format can actually be glitched, and it's always very controlled. There's an augarithm that like, plays around with the original values and then parses them back into f b x. Some of these, they look like creatures in some sense. Othes thes kind of like bands coming off a their extremities.