This is a picture of a  yellow truck toy and a bathroom freshener.The bathroom freshener represents the low key which is mostly darkness and the  yellow toy truck represents high key which represents  light. I took the bright light from in the bathroom and placed it under the bathroom freshener while holding it with the lights off to give it the low key color quality.For the yellow toy truck I turned off the lights to and face the camera almost pointed to the floor so when the flash comes on it reflects the light on to the truck giving the truck a bright glow, (high key)Bathroom freshener in darkness means in darkness there always light and the the toy truck, light reflects off of anythings.