When the system is coarse-grained, it can approach either of two different fixed points; one corresponds to T = 0°K and the other corresponds to T = ∞. The demarcation point is the critical point and the critical exponents are determined by the flow of the renormalization transformation. Load an initial configuration at a given temperature and run for a while before posing. Then copy the spin configuration to the right panel. Observe how it looks like when coarse-grained.