its lime there conestants climbing an obstacle course and the weak ones are falling off and the last one on wins (i know its weird)
u didnt understand it atomic2385
(sorry for bad English) Someone else made something based on the same rule, and explained it, so you propably just copied the basic idea, but +1 anyway.
Simple really- they have different densities, and because TPT powder physics operate not just on adjacent particles, but on those in a 3x3 area centred on the particle. You can try this: make a bowl of DMND and put some oil, soap and water in it, and they will separate into different layers. this happens IRL as well because oil and water are immiscible. But +1 because you managed to get something simple to FP!