Minimal busy/free indicator

Working in a crowded office and getting disturbed by your workmates all the time? Need some time to focus but don't want to be rude to them?
Let them know with this minimal “free/busy” indicator. Just put it to red when you want to focus on your work and don't get disturbed.

I also added some holes for magnets so it stays in place easier. But if you don't want to put the magnets you can just print it as it is, it should friction-snap in place.

The magnet size is 12mm diameter x 2.5mm thickness.

To add the magnet you should add the instruction to pause the print on your slicer. I use PrusaSlicer, to add this pause command, after slicing the model, you should go to the layer before the one covering the magnet, and right click on the plus sign and select the “Add pause print” instruction:

Then just add a drop of glue and drop the magnet, if you don't do this it will probably stick to the nozzle once it starts printing again.

For putting it together, you have to put the cover first, then screw both colours together, so the cover part stays “trapped” between them.