context.ly

\version "2.20.0"
\language "english"

\score { % start of single compound music expression
  \new StaffGroup << % start of simultaneous staves section
    \time 2/4
    \new Staff { % create RH staff
      \clef "treble"
      \key g \minor
      \new Voice {  % create voice for RH notes
        \relative { % start of RH notes
          d''4 ef16 c8. |
          d4 ef16 c8. |
        } % end of RH notes
      } % end of RH voice
    } % end of RH staff
    \new Staff << % create LH staff; needs two simultaenous voices
      \clef "bass"
      \key g \minor
      \new Voice { % create LH voice one
        \voiceOne
        \relative { % start of LH voice one notes
          g8 <bf d> ef, <g c> |
          g8 <bf d> ef, <g c> |
        } % end of LH voice one notes
      } % end of LH voice one
      \new Voice { % create LH voice two
        \voiceTwo
        \relative { % start of LH voice two notes
          g4 ef |
          g4 ef |
        } % end of LH voice two notes
      } % end of LH voice two
    >> % end of LH staff
  >>
  \layout {}
  \midi {}
} % end of single compound music expression