1\version "2.19.28"
2
3\header {
4  texidoc = "@code{\\once \\revert} can be used for reverting a property
5once rather than permanently."
6}
7
8\layout {
9  ragged-right = ##t
10}
11
12\relative {
13  c'4-"b" d-"b"
14  \override NoteHead.color = #red
15  e4-"r" f-"r" |
16  \once \override NoteHead.color = #green
17  g4-"g" a-"r"
18  \once \revert NoteHead.color
19  b-"b" c-"r" |
20  \temporary \override NoteHead.color = #yellow
21  g-"y" e-"y"
22  \once \revert NoteHead.color
23  d-"r" c-"y" |
24  \revert NoteHead.color
25  d-"r" e-"r"
26  \once \revert NoteHead.color
27  f-"b" d-"r" |
28  \revert NoteHead.color
29  c1-"b"
30}
31