Spirograph Draw
A spirograph on a pad of cream drawing paper lying on a dark desk: a clear plastic ring with 96 inward teeth, printed ticks and its size, and inside it a tinted translucent gear with five pen holes and a pen standing in one of them. Dragging round the ring rolls the gear and the pen draws a hypotrochoid in real ink that builds up into a rosette, while the rest of the closed pattern shows faintly in pencil; until anything is drawn a small arrow sweeps round the ring to show the way. A header reads "Spirograph" with the gear, hole and loop count ("40-tooth gear · hole 3 · 12 loops") and a Clear button; under the pad a hint and three rows of controls pick the gear (30, 40, 56 or 72 teeth), the pen hole (1–5) and the ink (ultramarine, vermilion, viridian or graphite). Inks overlap like real ink, a tap on the paper moves the pen to the next hole, and Clear tears the top sheet off the pad.
React Native · Expo SDK 52+, TypeScript
✦ If the result drifts from the video, tell your agent what looks different and how it should look. A short correction usually closes the gap.