.zshrc

function timer(){
  local title icon min sec t
	min=0
	sec=0
	t=0
	title="Timer"
	icon=""

	while getopts m:s:t:i: OPT
	do
		case $OPT in
			"m" ) min=$OPTARG
						;;
			"s" ) sec=$OPTARG
						;;
			"t" ) title=$OPTARG
						;;
			"i" ) icon=$OPTARG
						;;
			 *  ) echo "Usage: $0 [-t title] [-i icon] [-m min] [-s sec]" 1>&2
				 		return;;
		esac
	done

	t=`expr $min \* 60 + $sec`
	if [ $sec -ge 60 ]; then
		min=`expr $min + $sec / 60`
		sec=`expr $sec % 60`
	fi

	while [ $t -gt 0 ]
	do 
		if [ $sec -lt 10 ]; then
			sec="0$sec"
		fi
		growlnotify -d 0 --image "$icon" -t "$title" -m "$min:$sec"
		if [ `expr $t % 60` -eq 0 ]; then
			min=`expr $min - 1`
			sec=59
		else
			sec=`expr $sec - 1`
		fi
		t=`expr $t - 1`
		sleep 1
	done
	growlnotify -d 0 -t --image "$icon" "$title" -m "END!" 
}