I've been running #pleroma on my #raspberrypi3 for a while now.
About 2 weeks ago I started learning #elixir and #phoenix
Now I've hacked my local #pleroma instance to support bot services: parse an incoming message, take an action, post the result. Elixir is really easy!
Inspired by the Reddit "Place" I created a proof-of-concept of a collaborative canvas. If you like, you can give it a try:
follow @pixelbot
and post some pixels to it. The bot will post the updated canvas.