These little guys attempt to model the way that bees find the warmest spot on the hive to congregate at.

The algorithm is really simple - the bees move about randomly and when they bump into each other they pause for a length of time proportional to the light intensity where they are.

Given time the bees will coalesce somewhere near the centre of the light source. Let them do this then click on the surface to reposition the light and watch them go off in search of it again.