Monitor state script in X11

monitor.sh

#!/bin/bash

status()
{
    xset -q | grep 'Monitor is ' | awk '{print $3}'
}

on()
{
    xset dpms force on
}

off()
{
    xset dpms force off
}

toggle()
{
    if [ "$(status)" == 'On' ]; then
        off
    else
        on
    fi
}

case $1 in
    status) status ;;
    on) on ;;
    off) off ;;
    *) toggle
esac