double bar at beginning

[José Luis Cruz]

Hello list, 


Does anybody knows how to put a double bar at the beginning of the Staff? The 
nearest that i have approached to solution is this:

\score{
  \notes{
    \partial 256 s256 \bar"||" c'1 | e'1 | f'1 | s1 \bar"||"

  }
\paper{
  raggedright = ##t
  \translator {
    \StaffContext
    \remove "Clef_engraver"
    \remove "Time_signature_engraver"
  }
}
}


But this is not good loooking. How could i enable the visibility of the first 
bar, without being any notes before it? :S


Thanks a lot, José Luis

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