Round A4 up to a multiple of 4 total pages. I can't easily get the number of actual pages processed, so rely on telling the (rather hacky, and surprising - I have to divide to a separate counter to force an integer result) macro the number of pages used before the current numbering started.

X: 1
T: Jamie Allen
M: C
L: 1/4
Q: 160
K: Gmaj
G/A/ | "G" B G G A | B2 G A/B/ | "D7" c A A B | c2 B A |
"G" G g "C" g e | "G" d2 B B/c/ | "D7" d d c/B/ A | "G" G3 :|
B/A/ | "G" G g g f | e d c B | "D7" A a a g | f d e f |
"G" g>a "C" g e | "G" d2 B B/c/ | "D7" d d c/B/ A | "G" G3 :|