The image below shows the 12th iteration of the Heighway Dragon. Click on the play button to see an animation of how one could start stitching this design at the "tail" on the left and alternate horizontal and vertical stitches until reaching the "head" at the right segments that intersect only at corners and never cross. The curve turns right at the end of each Red segment and turns left at the end of each bLue segment. The three buttons labeled slow, normal, and fast will adjust the drawing speed.