Stare at the shadow of her foot. Remember that it is only shown when her leg his behind her. It is the back part of the spin. The leg doesn't cast a shadow when it is in front of her body, only behind. Concentrate, concentrate. And when you wake up she will be spinning counterclockwise... and your wallet will be missing.
Nope, doesn’t change. Think that means I’m just ornery and stuck in my ways. ;)
All you need to do is stare at the image of the spinning woman for 30 seconds.
I tried this, and about 15 seconds in, the images instantly flips from left-hand rotation to right-hand rotation.