haha look at this!
concentrate on the 4 dots in the middle of the picture for about 30 secs. Then take a look at the wall and start blinking your eye, you will see a circle of light... continue looking at that circle...... What do you see?
concentrate on the 4 dots in the middle of the picture for about 30 secs. Then take a look at the wall and start blinking your eye, you will see a circle of light... continue looking at that circle...... What do you see?