\version "2.16.0"

\score {
  <<
    \new ChordNames \chordmode {
      ees2:m7.5-  aes:7.5+.9-
      des1:maj7
    }
    \new Staff {
      \key des \major
      \numericTimeSignature
      \time 4/4
      \override Stem #'stencil = ##f
      \improvisationOn
      \repeat unfold 2 \relative c'' { b4 b4 b4 b4 }
      \improvisationOff
      \revert Stem #'stencil
      \bar "|."
    }
  >>
} % score