Puzzle from Ecole 42 evaluation

Question

This is Evaluation game 2 for Ecole 42. I'm stuck with this one in my mind. Is there any solution or suggestion for this one?

Answer 1

I got stuck in this one too. I wonder if this could be a good solution, but can't test it...

f0 - {if red turn left / forward / if blue f1 / f0 }

f1 - {forward /if red turn right / if blue f0 / f1}

like a zig-zag and the blue box do the shift of the turn side...