LaTeX Coffee Stains (2009) [pdf]
hanno-rein.de
hanno-rein.de
There is also a wine version, if that is your preference: https://www.overleaf.com/latex/examples/latex-wine-stains/cd...
I've seen that cthulhu-worshipping madman one before, but the results are disappointing. I'm sure much better can be done in that direction. e.g. (is this the most famous SE answer of all-time?) https://stackoverflow.com/questions/1732348/regex-match-open...
Let the chaos ensue!
EDIT: accidentally linked to a different graphics. Now it's fine.