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

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

#poem[
  #block[
    ‘Twinkle, twinkle, little bat! \
    How I wonder what you’re at!’
  ]
]