It's interesting how the two types in the simulation are said to be "happier to live in a diverse environment" but their only preference that leads to actual be

It's interesting how the two types in the simulation are said to be "happier to live in a diverse environment" but their only preference that leads to actual behavior is "when I'm in a 1/3 minority or less I'm unhappy and have to move". Further down, when the shapes show their preference for neighborhood diversity in actual behavior, you get diverse results.