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Luhn's CA

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Ale
Luhn's is one of the little algorithms most present in our everyday life. It's used to calculate the control digits of credit cards and check them in online transactions. This script explores some aesthetical properties of Luhn's algorithm using it in a process wherein each cell adquires a new state (represented by an integer in the range 0-9 mapped to a gray value) based on Luhn's checksum of the states of its neightbours. A nicer pure canvas version here: http://414c45.net/canvaslab/luhn/
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