You know what's cool, genetic algorithms:Click on a shape to select it
The green box highlights the shape most like the selected shape
Pressing shift will being a genetic algorithm that will attempt to recreate your desired shape.
Pressing shift again will pause the process
You can select a new shape at any time by clicking
You can create a brand new population by pressing space
You can speed up/slow down the gnereations with the up and down arrows, respectively