There aren't 4 pictures. From: https://www.threads.com/@xiayang1162/post/DfgENZcmEve?xmt=AQG0oZK-fQ5qjpbhvUGHaxb_5RpiyNkWs9Q6Jt61O2ZYqVZD1REz1H71Ozc_BDC2dmIBdQk&slof=1 #opticalIlusion #photography