Synesi

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an optical illusion of a black and white checkered pattern .
an optical illusion of a black and white checkered pattern
two images of a man 's face upside down and smiling
a black and white grid with white dots on a black background
an optical illusion with the words " our eyes can fool us "
a black and white photo of a man with the words " the trouble with the world is not that people know too little " on the bottom
a black background with white writing that says if you 're using this i mean to value you and consider