Ants wander, leaning toward pheromone. An ant that finds food carries it home and lays a trail as it goes. Every step, the trail evaporates a little everywhere.
Tap to put down more food. The same ?seed= always gives the same run.
LITStigmergic foraging (Deneubourg-style). Food left + food carried + food delivered must equal the food placed, and pheromone must never go negative, or the page throws.
AMBERThe trails are near-shortest, not guaranteed shortest.