Reaction parameters

Feed rate F: 0.036 Kill rate k: 0.061 Diffusion ratio (Db/Da): 0.50 Simulation speed (steps/frame): 6 Preset

Live readout

Grid cells—

Steps computed—

Coverage of B—

Classified regime—

The Gray–Scott model tracks two chemicals A and B on a grid. A is replenished at rate F, B is removed at rate (F+k), and the reaction A + 2B → 3B consumes A to make more B wherever both are present. Diffusion spreads each chemical to its neighbours every step, so a single reaction+diffusion loop run over thousands of cells produces the spots, stripes and maze patterns seen in real chemical and biological systems (animal coat markings, coral growth, cell signalling).

Grid state (brightness = A − B)