Prey (+1) breed into empty neighbouring cells. Predators (−1) eat a neighbouring prey to breed, wander into empty cells, and die at a fixed rate. Every rule is local.
Tap to release a pack of predators. The same ?seed= always gives the same run.
LITA stochastic lattice Lotka–Volterra system. Every 30 steps the tracked populations must equal a fresh count, or the page throws.
AMBERReading prey and predators as +1 and −1 is the site’s language.