Step One
While staring straight at the screen, hold up a finger in front of you, pointing at the celling.
You should see two copies of your one finger.
Step Two
Move your hand around until the two copies are floating over the two balls in the sample picture.
Keep staring at the screen while you do this.
Step Three
Blink until you see one complete ball in the middle.
Now You get it? Then take a look at the Picture below!