Identicons!
Our Identicons are simple 5x5 "pixel" sprites that are generated using a hash of the user's ID. The algorithm walks through the hash and turns pixels on or off depending on even or odd values. These generated patterns, combined with hash-determined color values, ensures a huge number of unique Identicons. Using a Gravatar but want to see what your identicon would be? Use this URL and replace my GitHub login with yours:
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