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

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

#poem[
  #block[
    “Then fill up the glasses with treacle and ink, \
    Or anything else that is pleasant to drink: \
    Mix sand with the cider, and wool with the wine--- \
    And welcome also/Queen Y/n with ninety-times-nine!”
  ]
]