Gold sits on the left and silver on the right, with 1% vacancies. A vacancy swaps with a neighbour when the neighbour jumps: gold with probability pAu, silver with pAg, and the seed makes them unequal.
Tap to stir vacancies in a patch. The same ?seed= always gives the same run.
LITVacancy-mediated interdiffusion; unequal jump rates are the Kirkendall effect (1947). Every 30 steps the gold, silver and vacancy counts must be conserved, or the page throws.
AMBERThe jump rates are made up; 79/21 electrum is the site’s TARDIS ring.