#!/bin/sh

Green='\033[0;32m'
Color_off='\033[0m'
Red='\033[0;31m'
Yellow='\033[1;33m'

batfull=$(cat /sys/class/power_supply/$1/energy_full)
batnow=$(cat /sys/class/power_supply/$1/energy_now)
batperc=$((($batnow/($batfull/100))))

if [[ "$batperc" -le "20" ]]; then
    printf "$Red$batperc$Color_off\n"
    exit 0
fi

if [[ "$batperc" -le "70" ]]; then
    printf "$Yellow$batperc$Color_off\n"
    exit 0
fi

printf "$Green$batperc$Color_off\n"