\version "2.18.2"

\score {  
  <<
    \new StaffGroup
    <<
      \new Staff = "1"
      {\repeat unfold 20 {c4 d e f}}
      \new Dynamics
      {\repeat unfold 20 { c4\p r r r }}
      \new DrumStaff = "2"
      {\repeat unfold 20 { R1} }
    >>
  
    \new PianoStaff
    <<
      \new Staff = "P1"
      {\repeat unfold 8 {c4 d e f} R1*12}
      \new Dynamics
      {\repeat unfold 8 {c4\p r r r } R1*12}
      \new Staff = "P2"
      {\repeat unfold 20 {R1}}
    >>
  >>
  
  \layout {
    \context {
      \Score
      %\RemoveEmptyStaves
    }
    \context {
      \PianoStaff
      %\RemoveEmptyStaves
    }
    \context {
      \Dynamics
    }
    \context {
      \DrumStaff
      \RemoveEmptyStaves
    }
  }
}