I really enjoyed this project so I had to try the four variations of it that were presented.  I also do Zentangle and one of my favorite tangles is paradox, which is basically curves of pursuit, so I also tangled a tile where I embroidered the paradox/curves of pursuit portion.  The tangled tile is 6" by 6" and the others are 8" by 8".  I embroidered the top four in different colors of metallic thread.  For the bottom four, I drew and colored the curves before embroidering them with black thread.  I am including close-up pictures of each piece even though the mistakes I made in some of them are more visible there.