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This is a 3D extrapolation of Conway's Game of Life, which is a type of cellular automaton (CA). Cells in this implementation work similarly to the 2D CA: a cell (represented as a sphere) looks at its neighbors. In 3D, a cell has 26 neighbors. Cells have four states in this model: no cell, red cell, green cell, blue cell.
The brick object underneath the CA contains the logic for running the simulation. The scripts in it listen to messages sent by the sphere controls These controls (looking from left to right) are:
Cell Controller: this is a binary switch that generates and destroys the matrix. Think of it as an initialization phase.