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→Contributors
:[http://zenit.senecac.on.ca/wiki/index.php/User:Anna.sobiepanek Anna Sobiepanek]
:[http://scottdowne.blogspot.com/search?updated-max=2010-02-02T05%3A41%3A00-08%3A00&max-results=7 scott downe]
:[http://www.learningprocessing.com/examples/chapter-15/example-15-1/ Daniel Shiffman]