For what it's worth.....
The picture is an animated gif file. http://18.104.22.168/images/dancer.gif
It consists of 34 frames or stills that are displayed for .003 seconds per frame, looping continuously. I checked the code and the loop does not change directions. The loop starts at frame 1, ends at frame 34, and starts over.
For me when I start with frame 1, the dancer is spinning clockwise. But even as I advance it 1 frame at a time, if I lose my "is that her front or back reference", she will change directions.
Look at frames 7 & 24. Which leg is extended...right or left?
Your answer will correlate to which direction she is turning. If I make the mental switch at those points, I can see her spinning back & forth 180 degrees only.
I believe this is one of those optical illusions or puzzles that we've all seen before (only moving).
Do you see a woman or a sax player?
It really comes down to your point of reference...what are you concentrating on?
Whatever the answer is, it was fun.
[This message has been edited by msutliff (edited 04-04-2008).]