This was a month ago, I was searching for a way to work with random points and growing populations. Then this idea appeared accidentally. I wasn’t trying to mimic the behavior of biologic cells (in fact I’m in a serious doubt about biomimicry in general).
The trick is to use timer + data recorder + a knob for the arbitrary user input. It starts to breed when you start the timer, but in order to change the evolution speed, just roll the knob! Of course the knob is as precise as in other input types, but somehow it looks more fuzzy to me. Combined with a time-based change, it becomes even crazy. Here is the Grasshopper definition: [GHX:0.9.0061]