In a gray area, I can see overlapping circles of light in the middle of the screen, rather than a uniform brightness. (thewirecutter.com)
Add a second layer of potatoes on top of the first layer, again in overlapping circles. (littlemisscelebration.com)
Imagine two overlapping circles with the overlapping parts representing the «we» and the side parts representing the the individuals. (marintherapyandcounseling.com)