You’re trapped in a dream featuring a Penrose staircase, the impossible architecture that characters grappled with in Inception. You start on the blue step, and you’re allowed eight moves. On each one, you may travel either up or down. If you go up, you move a number of spaces equal to N-1, where N is the number on the step you began the move—6 at the start. If you go down, travel N+1 spaces. At the end of your move, you’ll be on a step with another