A blackout poem made from a page of Leaves of Grass by Walt Whitman.  Words of the poem are blacked out by black marker. The remaining words are circled in blue, except for the last line, where the words are circled in red.

By anonymous

tympanum with steel!
music hall serve for our prelude,
the lady of this city,
dead struck
Till with hum at daybreak pour’d out its myriads.