battery colored output for osx shell

battery.sh

# Should colorize output                                                                                                                                                                         
alias battery="battery_stat"
function battery_stat() {
    PERCENT=`ioreg -l | grep -i capacity | tr '\n' ' | ' | awk '{printf("%d", $10/$5 * 100)}'`
    # Colors for humans                                                                                                                                                                          
    NON='\033[00m'
    BLD='\033[01m'
    RED='\033[01;31m'
    GRN='\033[01;32m'
    YEL='\033[01;33m'
 
    COL="$RED"
 
    if [ "$PERCENT" -gt "15" ]
    then
        COL="$YEL"
    fi
 
    if [ "$PERCENT" -gt "30" ]
    then
        COL="$GRN"
    fi
 
    echo -e "${COL}${PERCENT}%${NON}"
}
 
 
# Colors!                                                                                                                                                                                        
export PS1="[\$(battery)]\[\e[00;33m\]\u\[\e[0m\]\[\e[00;37m\]@\h:\[\e[0m\]\[\e[00;36m\][\W]\[\e[0m\] $ "
 
# output but colored:
#
# [99%]tstrazzere@bebop:[ldpreloadhook] $