#!/usr/bin/bash

CMD="brightnessctl set"
STATUS=$(brightnessctl g)

if [ $1 = 'd' ]; then
    if [ $STATUS -le 11 ]; then
        bash -c "$CMD 1"
    elif [ $STATUS -le 51 ]; then
        bash -c "$CMD 10-"
    else
        bash -c "$CMD 50-"
    fi
elif [ $1 = 'u' ]; then
    if [ $STATUS -lt 51 ]; then
        bash -c "$CMD +10"
    else
        bash -c "$CMD +50"
    fi
fi