4 nt = \notes { c1 \break c1 c1 }
5 stuff = \notes \relative c'' <
6 \context Staff = stone { \nt }
7 \context Staff = sttwo { \nt }
11 \context StaffGroup \stuff
15 \context StaffGroup < \context GrandStaff \stuff
16 \context Staff = stthree \nt
21 \context ChoirStaff \stuff