白いハートの上に黒い縞模様を、黒いハートの上に白い縞模様を載せます。本図の条件では左右のハートは同じ白黒縞になりますが、左は白く、右は黒く見えます。 The left heart appears to be white whereas the right one black.pic.twitter.com/3Q6fXYskjE
6:02 PM - 2 Jan 2017
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