\version "2.13.57"

  \paper {
    ragged-right = ##t
  }

  upper = \relative c'' {
    \clef treble \key ees \major \time 4/4
    \showStaffSwitch
    s2 <c a e>4\arpeggio r |
  }

  lower = \relative c, {
    \clef bass \key ees \major \time 4/4
    \times 2/3 { fis8( e' a } \change Staff = "r"  \times 2/3 { c e a) } \change Staff = "l" <fis, c'>4\arpeggio r |
  }

  dyn = { s1\mf }

  \score {
    \new PianoStaff <<
      \set PianoStaff.connectArpeggios = ##t
      \new Staff = "r" { \upper }
      \new Dynamics { \dyn }
      \new Staff = "l" { \lower }
    >>
    \layout {}
  }