#let poem(content) = {
  set par(first-line-indent: 0em)

  align(center, block[
    #set align(left)
    #set block(breakable: false)
    #content
  ])
}

#poem[
  #block[
    “But he was very stiff and proud; \
    He said ‘You needn't shout so loud!'
  ]

  #block[
    And he was very proud and stiff; \
    He said ‘I'd go and wake them, if---'
  ]

  #block[
    I took a corkscrew from the shelf: \
    I went to wake them up myself.
  ]

  #block[
    And when I found the door was locked, \
    I pulled and pushed and kicked and knocked.
  ]

  #block[
    And when I found the door was shut, \
    I tried to turn the handle, but---”
  ]
]