blank sheet

[Gianmaria Lari]

In the manual at 

http://lilypond.org/doc/v2.19/Documentation/snippets-big-page#staff-notation-creating-blank-staves

there is a code similar to this to create a blank staves. 

\score {
  { \repeat unfold 12 { s1 \break }}
  \layout {
    indent = 0\in
    \context {
      \Staff
      \remove "Clef_engraver"
      \remove "Bar_engraver"
    }
    \context {
      \Score
      \remove "Bar_number_engraver"
    }
  }
}
\paper {
  #(set-paper-size "a4")
  ragged-last-bottom = ##f
  line-width = 180
  left-margin = 15
  bottom-margin = 10
  top-margin = 10
}

Using 

\set Staff.forceClef = ##t 

inside the repeat I tried to change it so that it prints the treble clef at the beginning of each line but it print the clef also at the end of each staves. How can I make it print it only at the beginning?

Thank you, g.