3 nt = \notes { c1 \break c1 c1 }
4 stuff = \notes \relative c'' <
5 \context Staff = stone { \nt }
6 \context Staff = sttwo { \nt }
10 \context StaffGroup \stuff
14 \context StaffGroup < \context GrandStaff \stuff
15 \context Staff = stthree \nt
20 \context ChoirStaff \stuff