縞を太くした。ハートは8分の1しか見えないが、左のハートは白く、右のハートは黒く見える。ネオン明るさ拡散? Thick stripes give illusory white and black hearts (neon brightness spreading?)。pic.twitter.com/LLFBY8fRFp
9:35 PM - 2 Jan 2017
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