A watchface version of the Spinning Dancer Illusion. The illusion was created in 2003 by Nobuyuki Kayahara. The pirouetting figure can appear to spin in either direction, due to a lack of visual cues for depth. http://en.wikipedia.org/wiki/Spinning_Dancer for more information.
It takes practice but you will be able to make the dancer change direction. The direction of rotation depends on whether you see the foot touching the ground as the left foot or the right foot.
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