Survival of the fittest – the constant battle for resources, the dynamic equilibrium between growth & decline, survival & adaption - is as valid at a human scale as at a microscopic scale.
Using yeast (Saccharomyces cerevisiae) cells I want to illustrate this “arms race” of evolution. Overpopulation and scarcity of resources is reflected in the growth of the cells. Over the course of the growth period and depending on the density of cells and the availability of nutrients, a picture should emerge from the entirety, resembling pixels on a screen or on a billboard.
(Further information on evolution: "Evolution 101" from the University of California, Berkeley.)