A brightfield agar plate on which a bacterial colony accretes from seed points, DLA/Eden-style, into lobed dendritic fronts: a diffusing nutrient field is consumed behind the advancing edge, so the colony starves in its own wake and fingers into fresh agar. It regrows on a loop; hover to plant a fresh colony, scroll to tilt the nutrient gradient, and press to drop antibiotic — a clear zone where growth halts.