#!/bin/sh

CSI=`echo | tr \\\\012 \\\\033`
fg="$1"
bg="$2"

complain() {
	echo "$*" 1>&2
	exit 1
}

test "$fg" -ge 0 -a "$fg" -lt 8 || \
  complain "Unsupported foreground color (should be 0..8)"

test "$bg" -ge 0 -a "$bg" -lt 8 || \
  complain "Unsupported background color (should be 0..8)"

echo "${CSI}[1;3$fg;4${bg}m"
clear