Each pixel and its eight neighbors are randomly checked for their color values. If the checked pixel is not white, look for the majority of colors around the pixel and color it in the same way. If the checked pixel is white and at least one neighbor is colored then color it randomly. It is possible to interactively set colored dots on the screen or scatter some colored pixels over the entire canvas. Sorry, it is a little bit sluggish at the moment. Made with processing. Will maybe become some kind of plant growth simulator / speculator or pattern generator.