Paint with the brush: ink pools where you slow down and runs dry as you go. The page measures how far your stroke has turned around the centre. A classic ensō is one turn, 360°. Here the circle is only finished at 720°, two laps, as in Dave's clock; at the end of the second lap a red seal is pressed.

MODEL the 720° completion is Dave's. LIT the ensō is a Zen calligraphy form, often a single stroke. ANALOGY ink diffusion is simulated on a grid, not real paper. Self-check: the winding angle is the sum of small signed turns and the seal appears only past 720°. ← SaPpH{{i}}on