educational use - writing violin clefs with pen

[bpeter]

Dear Lilypond users,

My son started to learn playing the violin, he is 7 years old. His theatcher
gave to him a blank sheet to practise writing the violin clef.

I decided to make a pre-written sheet with violin keys for easy learning. 
Thank you for the programmers of Lilypond, I was successful, so I public my
Lilypond file here:

-----------------------------------------cut
here-------------------------------------

\layout{ indent = #0 }

         violinsettings = {
        %I don't want to change the Clef's size
        \override Staff.Clef #'full-size-change = ##t

        %Well, I am absolutely not sure about this.
        %I'd like many violin cleffs
        \override Staff.Clef #'break-visibility = ##(#t #t #t)

        %Let the Clef's color grey, so children can redraw it with
        %a pencil
        \override Staff.Clef #'color = #(x11-color 'grey80)

        }

     %----------------------------------------------
     %The big violins
     %----------------------------------------------
     \new Score \with {
       \override TimeSignature #'transparent = ##t
       defaultBarType = #""
       \remove Bar_number_engraver
     } <<


       \new Staff {
                \override Staff.StaffSymbol #'staff-space = #4
                \override Staff.Clef #'font-size = #+12
                s1 % Let the first violin black
                \violinsettings
                s1 s1 s1 s1 s1 \break
                s1 s1 s1 s1 \break
      }
        >>

     %----------------------------------------------
     %The medium-sized violins
     %----------------------------------------------
     \new Score \with {
       \override TimeSignature #'transparent = ##t
       defaultBarType = #""
       \remove Bar_number_engraver
     } <<

       \new Staff {
                \override Staff.StaffSymbol #'staff-space = #2
                \override Staff.Clef #'font-size = #+6
                s1
                \violinsettings
                s1 s1 s1 s1 s1 s1 s1 \break
                s1 s1 s1 s1 s1 s1 \break
       }
        >>

     %----------------------------------------------
     %The normal-sized violins
     %----------------------------------------------
     \new Score \with {
       \override TimeSignature #'transparent = ##t
       defaultBarType = #""
       \remove Bar_number_engraver
     } <<

       \new Staff {
                s1
                \violinsettings
                s1 s1 s1 s1 s1 s1 s1 s1 s1 s1 s1 \break
                s1 s1 s1 s1 s1 s1 \break
       }
        >>

-----------------------------------------cut
here-------------------------------------

Because writing small things is a hard task for a child, the sheet starts
with HUGE violin clefs.
The color of clefs is grey, so children can re-draw it with a pencil or pen.
After practising with re-drawing, children can write his/her own violin
clefs onto the gaps between the 
pre-written ones.

I am a new lilypond user and I can't know the Scheme language. I wrote this
lilypond file after the "Empty Staff" example in the Lilypond user guide.

Please let me know, if there is a better/more elegant way for doing this.

http://www.nabble.com/file/p15402276/violin-sheet.pdf violin-sheet.pdf 

Thank you
Peter


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