A cellular automiton where you choose the rules. To play, just select some of the numbers on the left and click go. A cell will turn black if it is touching exactly the specified number of black neighbours. So if you choose 1 and 3, then a cell will become black if it is touching exactly 1 or 3 black cells. In the previous version, a cell would remain black once turned. In this version, it will only remain black as long as the rules continue to apply.
http://www.wolframscience.com/nksonline/page-928b-text @Kinderlabor recommended letting the user select the rules. Thanks @Kinderlabor! For interesting results, include a 1, or a 2 in your rule set. Otherwise the set will not evolve.
