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Diatom is a simple B&W graph plotting program based on Fourier Transform using an algorithm by Brian McGhie which produces nice "flower" type of graphs/shapes. Output can be printed out on a printer or a HP plotter. You can save and open script files to redraw the same formulas. It's quite nice, you can set it to auto and every couple seconds it redraws another "flower" graph.
Diatom.sit (18.14 KiB / 18.58 KB)
Diatom v1.0 / compressed w/ Stuffit
Mac OS 6.x (maybe earlier too) - Mac OS 9.2.2
Note: Opening any dialog window, such as options freezes the app under Mac OS 9.0.4, only option is to force quit (or reboot if under an emulator).
Emulating this? It should run fine under: Mini vMac