#!/usr/bin/env bash # YES_ZSH # YES_BASH # NO_DASH colors() { [ $# -eq 0 ] || { printf "%s\n" "$0: does not take arguments" >&2; return 1; } printf "\e[%dm$(printf " \e[%dm mV \e[40m" {4,10}{0..7})\e[0m\n" {3,9}{0..7} } [ "${SOURCING:-0}" -gt 0 ] || colors "$@"