This is a Cycloid-like family of curves, generated by its classical description: a rolling circle. In Grasshopper, we don’t need to roll the circle, but divide its path, utilizing data lists to simply rotate and evaluate it. It becomes more interesting when you play with the definition, chosing multiple evaluation points from the list of rotated circles. Here is an example: Here is the Grasshopper definition: [GHX: 0.9.0072]