Mathematic Rays.

Try it.

Choose a multiplier and radius, then morph between patterns. Small changes can produce very different shapes.

Animation follows the site’s Motion control. You can pause the drawing at any time.

These are modular multiplication circles, also known as times-table circles. At a multiplier of 2, the lines outline a heart-shaped cardioid (opens in a new tab). Try 3 for a two-lobed nephroid, then explore the shapes in between.

From the original sketch.

Straight lines gather into curves, then loosen into something new. I like how a small change can turn a familiar shape into a surprising one: a little order, a little play, and room to get lost in the details.