A kaleidoscope is an optical instrument, typically a cylinder with mirrors containing loose, colored objects such as beads or pebbles and bits of glass. As the viewer looks into one end, light entering the other end creates a colorful pattern, due to repeated reflection in the mirrors.

https://en.wikipedia.org/wiki/Kaleidoscope

"We long to be here for a purpose, even though, despite much self-deception, none is evident."
Carl Sagan
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