\include "gregorian.ly"
\score {
  <<
    \new VaticanaVoice = "cantus" {
      \override Staff.StaffSymbol.color = #(x11-color 'black) % override default red color of staff
      \clef "vaticana-fa2"
      \[ d\melisma d \melismaEnd \] c\ictus d f\ictus g \augmentum f \divisioMinima
      e\ictus f g \[ f\flexa\melisma e \melismaEnd \] \augmentum d \augmentum d \divisioMaior
      f f \[ f\flexa\melisma e \] \melismaEnd d e f \[ g\melisma a g a bes \augmentum a\melismaEnd \] \divisioMinima
      a a g f \[ f\melisma \pes g \melismaEnd \] \augmentum f \divisioMinima
      f f \[ e\episemInitium\melisma \pes f \episemFinis \melismaEnd \] g \[ f\flexa\melisma e\melismaEnd \] \augmentum d \augmentum d \finalis
    }
    \new Lyrics \lyricsto "cantus" {
      Da pa -- cem Do -- mi -- ne in di -- e -- bus no -- stris:
      qui -- a non est a -- li -- us
      qui pu -- gnet pro no -- bis,
      ni -- si tu De -- us no -- ster.
    }
  >>
}