Keywords: DaN w edges 2.gif Day Night gun and anti-gun 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 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 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 Black dead cell en wikipedia by <font color 007BA7 size 5 > ˜©</font><font color E52B50 size 3 face Harlow Solid Italic >Damërung</font> <font color 007BA7 size 5 > ˜©</font><font color 808080 > -- <small>06 30 19 July 2009 UTC </small></font> using http //tools wikimedia de/~magnus/commonshelper php CommonsHelper <br/> original text 1 I created this work entirely by myself 2009-07-13 Simpsons contributor talk Simpsons contributor original upload log page en wikipedia DaN_w_edges_2 gif 2009-07-13 05 09 Simpsons contributor 522×474× 1966971 bytes <nowiki> Day Night gun and anti-gun I created this work entirely by myself 13 July 2009 ~~~ </nowiki> Animated GIF Animations of cellular automata |