Aerol E. Catubag created this simple, but effective optical illusion involving colors! As Aerol explains, he discovered the illusion accidentally when trying to make a kaleidoscopic image. The illusion happens when you move your head back and forth. Watch the colors change their size, depending on your actions. For example, the blue box will seem to expand when you move forth, but the exact same box will shrink when you move your eyes further away.
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