The facebook trick that creates "magic circles"..?

this is it: THE FACEBOOK TRICK: press up,up, down, down, left, right, left, right, B, A, Enter key, then right click then press up and down and magic crcles will appear. the only way to get rid of them are to log off or refresh the page...IT WILL WORK! put this as your status if it worked for you!! but why... show more this is it:
THE FACEBOOK TRICK: press up,up, down, down, left, right, left, right, B, A, Enter key, then right click then press up and down and magic crcles will appear. the only way to get rid of them are to log off or refresh the page...IT WILL WORK! put this as your status if it worked for you!!

but why does it work
and whatttt are those circles.
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