Sleet by Frog //ROi
232 bytes intro for STM32
Tested on STM32L100 board, but bare chip STM32L100RCT6 is enough. Also you need CRT X,Y oscilloscope to watch. Connect X, Y to PA4, PA5 pins (DAC outputs).
If it won't run try switch off/on power.
Video: https://www.youtube.com/watch?v=Iu6w_w73PlY
Released at Chaos Constructions'2021 Winter demo party
License: MIT