Quoting from the end of the paper:<p>"Source code and a phase diagram generating Python script are available under the M.I.T. license on github.com at <a href="https://github.com/mattbierbaum/moshpits" rel="nofollow">https://github.com/mattbierbaum/moshpits</a> . An interactive Javascript version of the simulation is available at <a href="http://mattbierbaum.github.com/moshpits.js" rel="nofollow">http://mattbierbaum.github.com/moshpits.js</a> ."