[sdiy] Using mains clocks for sequencing?

[cheater cheater]

I wonder if anyone's ever done an installation using mains clocks
(like eg the mechanical kind) for gating notes on a polysynth playing
pads, sequences, and the like. That could be a funny permanent
installation, especially if you display the clocks in a glass case, so
people know when to show up if they want to see something specific.