Unroll the tape on your right index finger, starting from where your thumb meets your index. That's the origin. Your thumb points along the positive Z direction. Your index points along y, and x is your middle finger points along x.

Rolled or unrolled?

A small wad, after getting stuck to itself and an unsuccessful attempt at separating it, that is now stuck to one of your fingers no matter how hard you attempt to flick it off.

You have to know these things when you are a king.