Now you see it now you don't. Your eyes and brain are lying to you!

OK, this little image is gonna trip you out! Read this below and then click on the image above to open in a new window and start the animation.

First, you see pink dots.

Now, stare at the + in the middle. First you start to see a rotating GREEN dot, and then the pink dots disappear altogether.

But there is no green dot, and the pink dots never disappear. It's all in your head.