\version "2.19.47"
\language "english"
expandVar =
#(define-music-function (xx start stop) (list? index? index?)
   #{ #@(map (lambda (i) #{ $xx . #i #}) (iota (- stop start -1) start)) #})


#(set-global-staff-size 18.0)

\header {
  title = "無盡感恩"
  subtitle = "Forever Thanks"
  composer = "曲詞 : 鄭鎧賢"
  arranger = "编 : 余遠淳"
}

\layout {
  \context {
    \Voice
    \consists "Melody_engraver"
    \override Stem #'neutral-direction = #'()
  }
}

global = {
  \key ef \major
  \numericTimeSignature
  \time 4/4
  \partial 4
  \tempo "Andante" 4=86
}



rht.116 = { bf''8 g'' |\break }

rht.117 = { \time 2/4 <c'f'c''>2 |}
rht.118 = { \time 4/4 r4 s4 <bf'f''>2 |}
rht.119 = { r4 s4 <g'c''f''>2 |}
rht.120 = { <bf'ef''>2 <c''ef''f''> |}
rht.121 = { s1 |}
rht.122 = { s1 |}
right =  {
  \global
  \expandVar \rht 116 122
  
}
lft.116 = { r4 |}

lft.117 = { \time 2/4 <bf,af>2 |}
lft.118 = { \time 4/4 ef8( bf \change Staff = right r8 g'8) \change Staff = left d'2 |} 
lft.119 = { c8( g \change Staff = right g'8 c'') \change Staff = left <a ef'>2 |} 
lft.120 = { <bf ef'g'>2 <bf af'> |}
lft.121 = { ef,16( bf, ef f g bf ef' f' \change Staff = right g'16 bf' ef'' f'' g'' bf'' ef''' f''' |}
lft.122 = { g'''1\fermata) |}
left =  {
  \global
  \expandVar \lft 116 122
}



pianoPart = \new PianoStaff \with {
  instrumentName = "Piano"
} <<
  \new Staff = "right" \with {
    midiInstrument = "acoustic grand"
  } \right
  \new Staff = "left" \with {
    midiInstrument = "acoustic grand"
  } {  \clef bass  \left } 
>>

\score {
  <<
    \pianoPart
  >>
  \layout { }

}