just watched this https://www.youtube.com/watch?v=TOpBcfbAgPg and came to my mind that we can create some sort of example [Hamiltonian cycle ](https://en.wikipedia.org/wiki/Hamiltonian_path) with the 7x7 pixel display of otto: 
just watched this https://www.youtube.com/watch?v=TOpBcfbAgPg and came to my mind that we can create some sort of example Hamiltonian cycle with the 7x7 pixel display of otto: