[alexmic]

I used two labels.

[rplnt]

Ah, I see now. I haven't realized instructions other than left/right cost anything. My solution should work in "real time".

(and even that could be done in two as well as I see now)

[Lewton]

Can you show your four label solution?

[rplnt]

I already closed it, so might be a bit different, but essentially this: https://paste.fedoraproject.org/285179/62077561/

I guess my interview wouldn't go that well :)

[Lewton]

Cool :)