Epicycle drawing machine

Loads an image, traces its outlines, and rebuilds them as sums of rotating circles — a Fourier series drawn in real time.

Open image…

Circles per path40

Speed1×

Trace mode

Threshold128

Max paths6

Invert (light shape, dark ground) Show circles Show target ghost

Drop an image anywhere on the page. Bold, high-contrast shapes trace best; for photos try Edges mode.

n = 40