It's a little bit code.google.com/p/tinkerit/wiki/Auduino + cibomahto.com/2008/03/controlling-a-clock-with-an-arduino/ + calebcoppock.com/Homepage/graphiteseq/graphiteseq.html

Looks like it might just work. Need to sort out contacts and find out what the best way to do the graphite trails is...

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