This reminds me of when I used to draw stuff on my TI-83 graphing calculator in high school using composited linear, elliptical, circular, parabolic, hyperbolic, exponential, and logarithmic equations (might be missing a few) as well as trigonometry such as sine waves. Yeah, I was a dork. I used to do it mostly during my electronics class in which the teacher was an older guy who was more focused on going on tangents (pardon the pun) about things unrelated to the class, and I'd get bored. If I didn't feel like learning about diodes that particular day, I'd just ask him what he felt about The Black Hand, and after 30 minutes of his cascading tangents ending in talking about the rainforest, he'd talk about diodes. "But, wait, was the Austro-Hungarian Empire just in their actions?" It was like a free hour of doing nothing. Probably the best and worst teacher (for different reasons) I had. Oh yeah, so anyway, I used to draw stuff on my graphing calculator and this video below reminded me of it. I mostly did the drawings using various equations during electronics class when the teacher started going off on tangents (pardon the pun).