Music hairpins

LilyPond source:

\version "2.2.0"

staffline = {  
  \new Staff {
    \time 4/4
    \clef treble
    \notes {
      \relative c''{
        a4.\mf\< gis16 a c4.\!\> b8
        a4\!
      }
    }
  }
}

\score {
  \staffline

  \paper {
    indent = 0.0\mm
    raggedright = ##t
  }
}