This is not an animated gif The movement in this mandala is due to an effect called visual vibration, achieved by juxtaposing particular colours and further enhanced through use of specific shapes and forms.
Illusory Motion "Some stationary patterns generate the illusory perception of motion. This unsettling effect is usually stronger if you move your eyes around the figure. If you hold you gaze steady on one spot, the motion will slow down or even stop. Because holding the eyes still stops the false sense of motion, eye movements must be required to see it. Vision scientist have shown that illusory motion activates brain areas that are similar to those activated by real motion."