The background featured on the front page is the result of running a certain 2D cellular automaton.

Here is the recipe:

1. Start with a 2ⁿ×2ⁿ empty board.
2. Awaken the four central cells.
3. A cell is born if it has one or two neighbors.
4. A cell dies if it has seven or eight neighbors.
5. Iterate until a stable state is reached.

Some examples:

• 256×256 board. Animated version.
• 512×512 board. Animated version.
• 1024×1024 board.
• 2048×2048 board.

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