Generated by: Ad-hoc code in C#
© Gábor L Ugray CC BY-NC-SA
This was my very first plot, before I even owned a plotter. I etched it onto a piece of paper with an Epilog laser cutter at a low power setting.
The simulation that creates these curves comes from "Seeded winds" on Turtletoy: turtletoy.net/turtle/307a045a2c. A flock of cardinal points diverge, chased around by a random acceleration vector.
Big thanks to @paulgb for letting me participate in his 2021 #PTPX with my laser-engraved postcards ;-)