Churros v9 — Pasta rgb fixer

A tall arch of ribbon in muted violet and ultramarine dominates the frame; at its far end, near a crosshair-and-circle marker, the ribbon breaks into a tightly crumpled tail of red, cyan and rust. The marker doesn't run one way — it eases to the strand's end, turns around and combs back over it.

Position along the stamp sequence is compared against a marker index driven by a sine of the clock, hence the back-and-forth. Stamps already passed swap their colour recipe: red and blue are clamped to constants and only green keeps a sine, collapsing the churning palette into one violet family, while unpassed stamps keep the full three-sine mix plus an extra twist multiplier. The fix is literally a different colour function on one side of an inequality.