This time, the lattice starts in fully random state. The temperature is low, so neighbor interactions are dominating. Therefore, the system quickly evolves away from the random state and clusters of either spin up or spin down form, as they are more stable.

A general explanation of Ising was included in my [last submission](https://www.reddit.com/r/ScienceGIFs/comments/46c4jd/demagnetizing_a_magnet_by_heating_a_2d_ising/d03y659).

This time, the lattice starts in fully random state. The temperature is low, so neighbor interactions are dominating. Therefore, the system quickly evolves away from the random state and clusters of either spin up or spin down form, as they are more stable.