English: Random walk in two dimensions with two million steps. In each step, there is an equal probability of going into any point in the 3x3 grid centered on its present position (i.e. it can go north, northwest, west, southwest, south, southeast, east, northeast, or stay where it is; with equal probability). After 2000000 steps the image was saved and cropped. The darker the region, the more it has been visited. Made with MATLAB using my own code.