Click inside the rectangle for a material design inspired effect Oh, and I know that if it was true material design it would be circles, not rectangles in the centre :P
Credit to @ilikelegos for the original project I transformed it to turn it into a material design style click effect :) Also made it FPS independent - it runs at the same speed in turbo mode :) See here for more info on material design transitions: https://www.google.com/design/spec/animation/responsive-interaction.html#responsive-interaction-user-input