Ha ha, Lissajous curves. I first discovered them in a math book, early on, in a phase when I had a craze for computer graphics programming. Plotted conics, sin

Ha ha, Lissajous curves. I first discovered them in a math book, early on, in a phase when I had a craze for computer graphics programming. Plotted conics, sine and cosine, Lissajous, derived curves of all kinds, independently discovered an algorithm to draw Spirograph-like curves, etc. Some Lissajous figures I drew looked like yellow flickering flames. Good fun. Edit: Re: flickering flames: Just looked it up: "Rational ratios produce closed (connected) or "still" figures, while irrational ratios produce figures that appear to rotate." From: https://en.m.wikipedia.org/wiki/Lissajous_curve https://en.m.wikipedia.org/wiki/Lissajous_curve Years later I blogged this: Lissajous hippo, retrocomputing and the IBM PC Jr.: https://jugad2.blogspot.com/2012/09/lissajous-hippo.html?m=0 https://jugad2.blogspot.com/2012/09/lissajous-hippo.html?m=0