3D Random Walk Using Digits of Pi

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This Demonstration shows a random walk using the digits of in base 4 as movement commands, starting in the center of the grid. The height at each grid point reflects the number of times the walker landed on that grid point.
Contributed by: Andrew Mattingly (May 2012)
Open content licensed under CC BY-NC-SA
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"3D Random Walk Using Digits of Pi"
http://demonstrations.wolfram.com/3DRandomWalkUsingDigitsOfPi/
Wolfram Demonstrations Project
Published: May 15 2012