You know you want it...

An Ode: to a Diode
(Cathode to ground)

Mirror, mirror, glued to galvo
Flipping photons out in salvos
Through the fog or haze they fly
Safely aimed three meters high.

All to make a little dot
That makes a picture glow a lot,
Pursued by felines, seen at shows
Linelight tracing as it goes.

Twinkle, twinkle little beam,
How we love your shiny gleam.