Yea this stuff "WAS" cool lol (NOTE: It has been patched. To see what it actually was supposed to do check out these archives of different repos/profiles implementing this exploit when it wasn't patched (Also I am aware this could have been used for malicious purposes but all i will have is just "haha funny gif as background"))
This repo: https://web.archive.org/web/20240607211040/https://github.com/jimkoutso2008/Jimkoutsocustombgtest
https://web.archive.org/web/20240607204925/https://github.com/cernodile/cerntest and https://web.archive.org/web/20240607213520/https://github.com/cernodile
https://web.archive.org/web/20240607212755/https://github.com/Hacker1245/test
https://web.archive.org/web/20240607213055/https://github.com/dominichayesferen
https://web.archive.org/web/20240607214524/https://github.com/angelbruni (though he did someother stuff that arent archived unfortunatelly