Evolution

Look at the evolution of organisms on a far-far planet. Each consists of a random set of cells:

＊ White - backup cells. Allow to make the last movement when the organism is almost dead.
＊ Green - energy cells. Provide strength and speed for wheels.
＊ Purple - battery cells. Define the time to overcome an obstacle.

The longer survival of an organism the stronger it becomes. The stronger it is the more genes in the evolutionary branch! Especially for the genetic algorithm fans