Nanobot Crop Guardian Field Map (2D)

A field of crop plants sits under threat from a spreading disease. Each infected plant leaks a biomarker that diffuses outward according to Fick's law, and a swarm of agricultural nanobots hunts it down the way chemotactic bacteria hunt a nutrient gradient — sampling local concentration, biasing their heading uphill, and dwelling to apply a precision dose the moment they arrive. This top-down map renders the same 40×40 finite-difference concentration grid the field is actually solved on. Tune swarm size, gradient-following strength, per-bot payload capacity, bot speed, capture radius, and how fast (and how quickly) the biomarker plume spreads and decays, then drag to pan and scroll to zoom while outbreaks shrink from red to healthy green.