[–] valtron 12y ago ↗ It's composed of two images with transparent backgrounds. The foreground on one of the images consists only of white, and on the other only of black. Depending on what color's behind the picture, it obscures one or the other.Edit: Gray background: https://twitter.com/SciencePorn/status/422565255726641152/ph...
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[ 42.4 ms ] story [ 235 ms ] threadEdit: Gray background: https://twitter.com/SciencePorn/status/422565255726641152/ph...