\version "2.19.4"

#(ly:set-option 'strokeadjust #t)

fast =
\relative f' {
  \scaleDurations 1/8 {
  \override Stem.thickness = 2
  f8[
    \omit NoteHead
    \omit Rest
    f g g a b b c] r1
  }
  \revert Stem.thickness
  \undo \omit Rest
  \undo \omit NoteHead
  c2.
}

ref = { r4 r2. }


\score {
  <<
    \new Staff \fast
    \new Staff \ref
  >>
}