Six circles that seem to rotate in different directions, even though they are completely rigid images.


Due to the colour contrast and the inwardly tapered scroll, the depicted circles appear three-dimensional and look like wheels.

Although the six wheels are rigid, stationary images, they appear to be turning. It is interesting to note that the wheel you are looking at directly is stationary, while all the other wheels in the neighbourhood rotate at different speeds. The further away the wheels are from the focal point, the faster they appear to move.