This video shows the laser show I did with an Arduino Nano and commericial 20Kpps galvos.
The whole project is available on:
so you can build the laser projector yourself!
The source code is available on Github:
Music by BitArts (Red Sector Mega Demo, 1989, Public Domain)
It actually looks a bit cooler in real life. I had trouble filming it with my camera, since it always re-applies auto focus when the show is dark for a moment. Human persistence of vision is much better than any camera!