Sleep Music Timer

#!/bin/bash
#VERSION2! Adds in a while loop which requires valid input and only
#spawns processes if valid input is given.
#This emulates the play/pause media button after the specified time.
#This REQUIRES xdotool as well as a player/shell that supports media keys.
param1=$1
re='^[0-9]+$'
while ! [[ $param1 =~ $re ]]
do
    read -p "Specify time in minutes: " param1
    echo $param1
done
if  [[ $param1 =~ $re ]]
then
    (sleep $param1"m" && xdotool key XF86AudioPlay) &
    echo "Pausing playback in $param1 minutes... sleep well!"
fi
#the parens run in subshell to suppress output as well as sleep in bg
#code by Noah B. Rawr.