#!/bin/bash
FILE="/sys/class/leds/asus::kbd_backlight/brightness"
SETTING=`cat "$FILE"`
COMMAND="$1"

if [ "$COMMAND" == "set" ]; then
    echo $2 > "$FILE"
elif [ "$COMMAND" == "up" ]; then
    echo "$(($SETTING+1))" > "$FILE"
elif [ "$COMMAND" == "down" ]; then
    if [ "$SETTING" != "0" ]; then
        echo "$(($SETTING-1))" > "$FILE"
    fi
elif [ "$COMMAND" == "party" ]; then
    while :; do
        $0 set 0; sleep 1; $0 set 3; sleep 1
    done
fi