This thing is a response to the trendy status-indicator USB lights on Kickstarter.

All you really need is something to show busy or available, focussed or flexible, red or green.

To make, just print the flag_half in two different colours, then print the base and slip it in. I used super-glue to stick the halves together and blu-tack to stick it to my monitor.

addamain made a base for this, so you can stand it on your desk! https://www.thingiverse.com/thing:4634930