Day &amp; Night gun and anti-gun.
<p>This figure is a "period 256 rocket gun which demonstrates the symmetry of the Day/Night rules, and how a signal can be sent across the border between day and night regions. Here a period 256 anti-gun destroys every other rocket from a normal period 128 rocket gun. Based on a reaction by Dean Hickerson." David I. Bell, May 1997
Legend :
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<ul><li>Green : cell that comes alive at this iteration. Shade indicates how many of the cell's neighbors are alive : darkest green indicates only 3 alive neighbors, lighter greens indicates more alive neighbors, up to 8 alive neighbors indicated by the lighest shade of green.</li>
<li>Yellow : cell that stayed alive at this iteration. Shade indicates how many of the cell's neighbors are alive : darkest yellow indicates only 3 alive neighbors, lighter yellows indicates more alive neighbors, up to 8 alive neighbors indicated by the lighest shade of yellow.</li>
<li>Black : dead cell.</li></ul>
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(<span lang="en" dir="ltr">Original text: <i><bdi lang="">I created this work entirely by myself.</bdi></i></span>)