The clock places the counting numbers 2 through 1,800 outward on a golden-angle sunflower spiral. Each new number turns by the same irrational angle, about 137.5°, while its distance from the center grows with the square root of the number. That creates even, seed-like packing without rows or spokes imposing a pattern of their own.

Prime-numbered positions form the steady white field. Composite positions stay hidden except for faint guide dots directly beneath a time bearing. Three ordinary clock bearings pass through the field: the hour reaches the inner 58%, the minute reaches 80%, and the second reaches the rim. Their different lengths keep them legible without color.

A prime brightens when its fixed golden-angle position falls close to one of those bearings. Every lit point passes two tests: its number is prime, and its angle currently aligns with the hour, minute, or second. Clock alignment causes the illumination. It does not mean the displayed time is prime or that the lit primes are consecutive.