horrors2

enbook

 1#! /bin/sh
 2
 3sigsize=$1; shift
 4printf "$sigsize:"
 5
 6comma=
 7for page in $(seq 0 2 $(expr $(expr $sigsize - 1 ) / 2)); do
 8    face=$(expr $sigsize - $page - 1)
 9    printf "%s%d(1w,0h)L+%d(1w,.5h)L," "$comma" $face $page
10    opage=$(expr $page + 1)
11    oface=$(expr $face - 1)
12    printf "%d(1w,0h)L+%d(1w,.5h)L" $opage $oface
13    comma=,
14done
15
16printf "\n"