The Bigger They Are:

[billy]

Goliath sleeps:
A pebble flies and hits the spot.
Goliath sleeps.
He roared so loud, but now he weeps.
When David swung his sling, and shot
the philistine would lose the pot;
Goliath sleeps.

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Tried my hand at a Rondelet; The instructions on how too, can be found here.