To start a 4 sided good luck knot, fold your cord in half and put it down, then pull 2 arms out of the side to make a plus (+) shape. The longer your arms, the easier they are to control and, obviously, the more working length you need for your cord. While the surface you’re working on is likely to have more friction than a polished scanner glass, even so the cord can still get pretty unruly like the picture to the left.