This Fence Poem by Ima Ryma

'Round the residence I first came
Made of wood so as to keep out
Livestock from gardens was the aim,
But then needed strengthened no doubt.
So the wood was replaced by stone.
Slowly iron and steel bars were set.
I messaged a no trespass zone,
My purpose to repel a threat.
Then guards, both human and dog sort
Constantly patrolled around me.
I was high tech sensored to thwart
Any over, under, through be.

Meant to deter any nonsense,
I'm the 'keep'em out' White House fence.