A mind-blowing optical illusion has taken the internet by storm - and it has been driving everyone crazy. At first glance, the illusion appears fairly simple, just two squares on a grey background.
The image is split into two sections - a smaller square in the centre and a larger square bordering it - both of which feature the same woven pattern. But if you look closely, you'll notice something very odd about the square in the centre. The baffling picture was originally shared by a Reddit user, who captioned it: "This is not a gif."