Sketchable Fourier Transform
Express you mouse sketches in terms of rotating complex exponentials:
You can find and interact with this demonstration here.
Alternatively, you can clone or download this repository, and then enter into one of its subfolders.
There you should find a README
file which contains further instructions.
Useful Videos
Mathologer: Epicycles, complex Fourier series and Homer Simpson's orbit
3Blue1Brown: But what is a Fourier series? From heat flow to circle drawings