These four square appear to move at different speeds , end and go , waiting for each other in pairs . In world , they are always moving at exactly the same unvarying speed . gravely . I launch the GIF in Photoshop and used guides to measure it — in every frame , the public square adjust perfectly .
Their movement is on the button the same but the perfect contrast of the lines and the light xanthous and the dark blue makes them look desynchronized while in motion . Your brain has difficultness check the yellow sharpness against the white and the dark blue air against the black .
The yellow appears to travel rapidly slow down as it enter the white lines , while the blue appear to slow down as it enters the disgraceful lines . In reality , it ’s all an optical illusion . Only when the squares get close to each other your head see they are travel at the same upper .

Optical Illusion
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