The "thread" in this version has an outline.
Adding an outline to an animated stroke was more challenging than I had expected. I considered adding a highlight as well, but that was even trickier. If it was a static image, adding both would be simple, but adding them as the stroke is being drawn is a different story. I made this in response to this challenge: https://scratch.mit.edu/projects/794636359/#comments-327720598 I used the following page as reference: https://www.animatedknots.com/palomar-knot
