Simple brain power. With brain power you can see what you want to see. Read the description.

There are a lot of possible ways to see (percepts) the toroids:
— rotating clockwise
— rotating counter clockwise
— going left, right, left, right 180 degrees (doing 180’s)
— going left, right, left, right 90 degrees (doing 90’s)

The tori can be seen turning clockwise, counterclockwise, oscillating 180 degrees and even oscillating 90 degrees.
With a little bit of mindpower you can change between the different ways of perceiving the tori!

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