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Rub those sleepy eyes and beautiful black girls sex massage porn videoput your spectacles on, folks -- this optical illusion is a real doozy.

Redditor NLS83 posted a head-scratching optical illusion Wednesday that could have you staring at your screen for hours, but once you see it, you won't be able to un-see it.

SEE ALSO: This viral optical illusion will make your head hurt

Can you spot 16 circles in this mess of straight lines and boxes?

CARD ID: 249193, CARD TYPE: Imgur

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You can do it, we know you can. Relax your eyes, look every part of the illusion, turn your screen upside down if you have to!

Don't worry, it took us a while, too. And it looks like some others also had a pretty difficult time, so you're not alone, pal.

Original image has been replaced. Credit: Mashable Original image has been replaced. Credit: Mashable Original image has been replaced. Credit: Mashable

But you'll get there! And once you do...

Original image has been replaced. Credit: Mashable Original image has been replaced. Credit: Mashable Original image has been replaced. Credit: Mashable Original image has been replaced. Credit: Mashable

Don't give up. Keep looking!

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