This is a work in progress implementation of a Falling Sand Game clone, which uses some more complex CA-style logic to update a grid. I only have two materials implemented and no interaction, as of yet, but the sand will sink in the water, and the water spreads side to side. I made use of Math.random() in js to randomly select the order in which to evaluate the neighborhood, which deals with some of the artifacts you get with the most basic implementation. With a little bit of work to synchronize everything, I have gotten these two working together, and eventually I intend to add more materials + controls.