I have a real soft spot for projects that hack esoteric hardware for some low utility fun. Andrew Schmelyun’s GitHub Issue receipt printer lands squarely in that zone.
I (re-)discovered shaders a few months ago and found this absolutely incredible animated portrait on Shadertoy. My math is pretty rusty so I probably only understand about 5% of it at the moment, but it’s something to aspire to.
from Inigo Quilez (https://iquilezles.org/)