Pick a random person; they adopt the opinion of a random neighbour. That is the only rule. The seed picks 2 to 8 starting opinions in the q.d colours.
Tap to plant a new opinion. The same ?seed= always gives the same run.
LITThe voter model (Clifford & Sudbury 1973; Holley & Liggett 1975). Every 30 steps the tally of each opinion must match a fresh recount, or the page throws.
WALLA model of a mechanism, not a claim about how people think.