Do you remember making shadow puppets growing up? Shadow puppets were created when you contorted your fingers and hands into specific shapes. You’d do all of this in front of a light. If you had your hands in the right positions, you could fascinate your friends with the creatures you could make.
Shadow puppets were always interesting to me. They’d allow you to create an image without actually having the object. Sometimes you’d make a dog or a bat or a bird. The options seemed limitless.
It was an illusion of the light and darkness. What was there wasn’t and what wasn’t really there was. What you saw was determined by what you were looking at.