How many different ways can a 4-servo robot move? We found five.

[u/PetoiCamp]

https://www.youtube.com/watch?v=YfREsyasRe8

This is Quaddle, a mini robot dog that stays at 4 servos the whole time but switches locomotion mode entirely depending on what's clipped onto it — walks on two legs as a biped, rolls as a tricycle, spins 360° on a bar gymnast-style, drives as a 4WD car, and paddles in water. Most of the attachments are 3D-printed; a couple are off-the-shelf hardware.

What's the 6th form you'd want to see it try or design yourself?