Position of staves

[Dr. Raphael D. Thöne]

Hi, 

I have created this simple code for use inside of lilypondbook.

right =  {  s1 s s s \break s s s s}

left = { \clef bass s1 s s s \break s s s s }

  

\score 

{    

\new PianoStaff \with {\override StaffGrouper #'staff-staff-spacing #'basic-distance = #10

}

<<

    \new Staff { \right}

    \new Staff {\left}

    

      >>

I changed the spacing between the right and the left system.

How can I now change the distance between the two staves (I mean between measure 1 and measure 5)? Which parameter do I have to override as well?

Thanks,

Raphael.