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:
 * 1) !/bin/bash


 * 1) Sleeper cell
 * 2) by Jeff Israel
 * 3) Licence: GPL
 * 4) usage: noxsaver TIME
 * 5) example: ./noxsaver 90m
 * 1) usage: noxsaver TIME
 * 2) 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