#!/bin/bash

if [ "$#" -ne 1 ] ; then
	echo "Usage : $0 +/-" >&2
	exit 1
fi

xrandr --output "$(xrandr --listactivemonitors | grep -o '[[a-zA-Z0-9\-]\{2,\}$' -m 1)" --gamma 1:0.3:0.3 --brightness 1.3