post_install() {
  cat << _EOF

==> Installation:
==> Add theme to your /etc/default/grub: GRUB_THEME="/boot/grub/themes/GNUAxiom/theme.txt"
==> Preferred resolution 1024x768: GRUB_GFXMODE=1024x768
==> Update grub:# grub-mkconfig -o /boot/grub/grub.cfg

_EOF
}