[Lilypond] How to add 12 bars of guitar strumming as Intro

[John Helly]

Aloha.

I'm writing a song for guitar and vocal that has the structure below. I would like to add 12 bars of strumming guitar as an Intro but cannot figure out how to add it within the Staff since it doesn't have a melody, only strumming of the chords.

I've been trying to figure out how to add this as a Voice (\Song.Voice.Intro) but can't seem to find the secret sauce or maybe that's the wrong approach?

Mahalos.
J.

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<<
\chords{ \theChords \theChords \theChords  }
\new Staff {
  \key a \minor
  \new Voice = "intro"   { \Song.Voice.Intro  \break }
  \new Voice = "verse"   { \Song.Voice.Verse  \bar "||" }
  \new Voice = "chorus"  { \Song.Voice.Chorus \bar "||" }
  \new Voice = "outro"   { \Song.Voice.Outro  \bar ":|." }
}
\new Lyrics \lyricsto "verse" { \Song.Lyrics.VerseI }
\new Lyrics
  <<
  \lyricsto "verse"  { \Song.Lyrics.VerseII }
  \lyricsto "chorus" { \Song.Lyrics.Chorus }
  >>
\new Lyrics  \lyricsto "verse" { \Song.Lyrics.VerseIII }
\new Lyrics
  <<
  \lyricsto "verse" { \Song.Lyrics.VerseIV }
  \lyricsto "chorus" { \Song.Lyrics.Chorus }
  >>
\new Lyrics  \lyricsto "verse"  { \Song.Lyrics.VerseV }
\new Lyrics  \lyricsto "outro"  { \Song.Lyrics.Outro }
>>
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