did-you-kno: If you concentrate on the black cross in the center of the animation, the spinning dot will aggressively turn to yellow. Can you see it? More facts and fun at http://did-you-kno.tumblr.com/
did-you-kno: If you concentrate on the black cross in the center of the animation, the spinning dot will aggressively turn to yellow. Can you see it? More facts and fun at http://did-you-kno.tumblr.com/
