Marble Madness

Nothing to do at the office? This will help you kill the time.
If the stepper does not rotate convincing, change t=t to t=2 in the ino-file.
A version without microprocessor is here:
https://www.thingiverse.com/thing:3065612
Also check the minimalistic version:
https://www.thingiverse.com/thing:3067296

https://youtu.be/I5OG_rP7GG8

Other ministepper projects:
https://www.thingiverse.com/thing:3046574
https://www.thingiverse.com/thing:3049531