This was us staring at the tricky new optical illusion below:
Squares, circles, circles, squares.
Redditor NLS83 posted the head-scratching optical illusion this week that could have you staring at your screen for hours.
But once you see it, you won't be able to un-see it. No matter how many times you blink.
Can you spot 16 circles in this mess of straight lines and boxes?
If all you're seeing is squares, never fear. You're not the only one baffled.
"Those were most definitely squares," one confused internet user commented.
"I still can't see circles, pls send help," another wrote.
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Just keep trying, you'll get there eventually.