Some Signs on Doors Say They’re Doors

Steer clear of doors.
Doors lead to doors.
A door’s a sign
There’ll be more doors,

A sign you’re in
Some kind of built
Thing made to hold.
An arch, a gate

Might make you think
Twice, too. Those walls.
Some folks like doors.
They think, I’ll go

In; they’ll lead me
On, let me out.
Watch out for those.
Their doors hide doors.