 I don't remember exactly when I implemented this. All I know for sure is I showed it to some folks in 2011 and it was really old at that point. This is before the movable feast machine. This is direct implementation of some sort. And what I like about it is, you know, there's no motion programmed into the cell membranes at all, but look where they end up just because of the geometry of engulfing food and retreating over waste.