Let colors fight over your screen canvas.

// POPULATION UPDATE

// Inspired by Conway's game of life:
//  if there is a sufficient population, then grow in numbers:
if(b0>=100)b=b0*1.01;
//  if the population is small then shrink
if(b0<100)b=b0*(0.99-fr/100);
//  if the population is too big then collapse
if(b0>240)b=0;
//  repopulate collapsed populations
if(b0<3)b=120;//zb*((1.5-f)+fr*f);

Updated the dot's color based on some crazy experimental whatever function. Feel free to wildly experiment for stunning art!

The fun starts once you couple the different colours, for example b=b0*(0.99-fr/100) == shrink blue faster when there is more green

Uses sdl2 as canvas: http://libsdl.org/

Compile and run with gcc -I /usr/local/include/SDL2 -lSDL2 game_of_colors.c -o game_of_colors && ./game_of_colors