Aquafleur, the tangle used on the heart-shaped string was one that I didn’t understand well for a long time. I tried it, as it was shown to me, and I just couldn’t figure out how those ribbons wrapped a given string.
Finally, one day, I just sat and played with it in my sketch book. And all of a sudden, it just “clicked” for me.
Here, it is used in an elegant, but simplified version.