1. Stare at the four dots in the middle of the picture for about 30 seconds2. Then stare at a wall in front of you3. Blink a few times and look at the circle of light

What do you see?

The following picture is not animated. Your eyes are making it move. To test this, stare at the black centre of one of the circles and it will stop moving. But move your eyes to the next black center and the previous will move after you take your eyes away from it!

(The right side of your brain tries to say the colour but the left side insists on reading the word)

The arrowheads are what causes the confusion. If you use a ruler you will see that the lines are the exact same size.