In case anyone is curious,

In case anyone is curious, here is my talk about my open hardware work over the years, with a good portion on LED hacking:
http://marc.merlins.org/perso/arduino/post_2019-01-24_Linux_conf_au-2019_-Using-Open-Hardware-from-my-shirt-to-OS-testing-for-Google_s-Fuchsia.html

Slides with lots of links: http://marc.merlins.org/linux/talks/Using_Open_Hardware/Using_Open_Hardware.pdf
Video: https://www.youtube.com/watch?v=Lm1jV_JRZHI
You can start around 20:32 for the LED work

Maybe this will be fun/entertaining to someone.