I thought it'd be fun to use a mirror to scan a laser across a
wall for a display.  I've had several ideas for how to make the mirror
scan the beam across and up and down, but they all seem a bit beyond
my mechanical abilities.  The latest idea I've come up with is to put
four permanent magnets on the back of a mirror, and a coil behind each
magnet to push/pull the mirror which is mounted on a pivot in the
center.  Will that actually work?  Is there an easier way?

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