How to turn off XScreenSaver and DPMS while watching videos/noxsaver script

This bash script is fairly basic. It only allows one unit enterd (minute, hours, seconds)

Examples

./noxsaver 2h
./noxsaver 90m

Code:

#!/bin/bash

#####################
# Sleeper cell
# by Jeff Israel
# Licence: GPL
#
# usage: noxsaver TIME
# example: ./noxsaver 90m
#

echo "turning off xsceensaver and dpms"
xset s off -dpms

echo "sleeping for $1..."
sleep $1

echo "back on :)"
xset s on +dpms