Mousetrap is a friendly demonstration of nuclear fission: for more
information, see http://www.santafe.edu/projects/swarm/examples/mousetrap/

Mousetrap demonstrates Swarm's facility for discrete event
simulation. Instead of broadcasting "step" messages to all objects on
a regular clock, the schedule execution in mousetrap only executes
"trigger" events to mousetraps when it is appropriate that they be
triggered. The result of a trigger event on one mousetrap is to
schedule trigger events on neighbouring mousetraps.

Please note that this application isn't running perfectly right now:
the graphs don't work, and the quit condition isn't active.