please document how this works

ok fine

this is the neopixel presence system. it talks to a server located in the 'echo-server' submodule and is named 'mob' if you have a hard time finding it there are two versions of the codebase that are on different git branches a. with the oled display (viv) b. without the oled display (eli)

so you will need to switch to the appropriate branch and build for the right hardware