I can draw it for you:
Stare at the woman. What do you see at either corner of your eye sight? A lamp? The wall? A TV? Another PC? A window? Whatever it is, turn your head and look at the object standing at the edge of your peripheral vision and keep on it, don't look back. There you go, she'll quickly start turning counter-clockwise, no need to look at it for a long time. She switches at a specific frame so it should only take a few seconds.
The blue circles are your eyes. Nevermind her raised arms.