Fourier Orrery (Complex Square Wave)

Models a 4-component, complex-valued square wave as a complex 1D Fourier transform. 3rd model of the Fourier Orrery collection.

Superseding the original square wave demo, this version uses all the learnings from the heart curve project to make a sturdier, more compact showpiece. A basic stand is provided, but wall mounting and faster spinning stands should be possible.

For the best print results and other info, check the [in-depth guide](https://docs.google.com/document/d/e/2PACX-1vT7X0YMG5Y6tzzH4M9Q6w5VP9gk4k0qf_NL0Cv0eSc8EXOw-UdATHgabLScxgi6B9fMhmohMum8TQC9/pub).