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The Fact
Trippy, right? Have you noticed the way in which your brain is trying to understand what it's being presented with? If you focus on one of the circles, your brain will attempt to fill in the white spots in your periphery with the black present inside the squares. This results in a disorienting flashing effect and it may start to hurt after a little while...
Here's how to understand bank employees! Why do they always tie pens for writing? If I trust my money to the bank, they surely must trust me, at least their pens! )))