I did manage to see it spin anti-clockwise. I thought of bank statements, money... But then it started clockwise again.
Actually, it's pretty weird. I manage to see a change in its spin:
- when I'm observing details of the picture spinning and focus directly on it: clockwise
- when I'm fading my focus towards it and think of something else, looking "beyound" it: anti-clockwise
- when I focus my attention on it again: clockwise
But whenever I'm back on page and first lay my eyes on it: clockwise, always.
When I start doing math in my head (additions, deductions and such): it changes to anti-clockwise. But... I need to look away from it doing math, and, while still doing math (and concentrating on the math), look at it again. It won't change while I'm looking directly at it.
If I stop the math, look away, and then look at it again: clockwise.