Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsRandom Walk Solutions to the Dirichlet Problem for the Laplace Equationhttp://demonstrations.wolfram.com/RandomWalkSolutionsToTheDirichletProblemForTheLaplaceEquatio/]]>http://demonstrations.wolfram.com/RandomWalkSolutionsToTheDirichletProblemForTheLaplaceEquatio/