Color shows established units lime, newborns cream, movement arrivals cyan, deaths coral, movement departures blue, birth conflicts pink, and movement conflicts violet. Inspect unit outlines candidate and accepted destinations. Arrow keys move; Enter edits when inspection is off; P plays or pauses; S steps.
Established unitBorn nowMoved hereDied hereBirth conflictMovement conflict
Watch occupancy become a trace of unit birth, motion, rest, and death rather than state owned by the grid.