fourier pen
A free generative art piece — play it in your browser, no install. Any picture, one line, a chain of spinning arrows. A Fourier series drawing machine in the browser: continuous-line tracing, live coefficients, wallpaper and video export, text-to-drawing via Cloudflare Workers AI.
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Open the live demo Source on GitHubFrom the README
Design and copy follow these standards.
Any picture, one line, a chain of spinning arrows. Fourier Pen finds the outlines in a picture, threads them into a single continuous line, and redraws that line with rotating arrows stacked tip to tail. Each arrow is one term of a complex Fourier series. You can watch it draw, read the actual coefficients, and save the result as a wallpaper, a vector, a spreadsheet of arrows, or a video.
Inspired by the epicycle drawings in 3Blue1Brown's "But what is a Fourier series?".
short prompt and let an image model draw a line-art version first.
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