A hero whose backdrop is pure string art: a few hundred straight chords across a circle under the map i → k*i, whose envelope is an epicycloid caustic that the chords draw without any curve ever being plotted; the pointer's horizontal position continuously morphs k, so cusps split and merge under the cursor.
pnpm dlx shadcn@latest add "https://design.helpmarq.com/r/hero-string-envelope.json"