\version "2.18.2"
\language "english"

global = {
  \key e \major
  \time 3/4
}

downOne = { \change Staff = "down" \voiceOne }
upTwo = { \change Staff = "up" \voiceTwo }

up = \relative c' {
  \global
  <<
    {
      bs4 cs a |
    }
    \\
    {
      gs8 \downOne ds \upTwo a'
      \downOne ds, \upTwo fs
      \downOne ds |
    }
  >>
}


down = \relative c, {
  \global
  \clef bass
  <<
    {
      \voiceOne c4\rest b4. s8 |
    }
    \\
    {
      \voiceTwo s4 b8. cs'16 b8 s |
    }
  >>
}


\score {
  \new PianoStaff <<
    \set PianoStaff.instrumentName = #""
    \new Staff = "up" \up
    \new Staff = "down" \down
  >>
}