shutdown PC script

#!/bin/bash
# Bash Menu for Shutdown and Halt

RED='\033[0;31m'
NC='\033[0m' # No Color

PS3='When do you want to shutdown and halt your computer? (minutes): '
options=("15" "20" "30" "40" "45" "50" "60" "Quit")
select opt in "${options[@]}"
do
    case $opt in
        "15")
            echo "${RED}you chose 15 minutes${NC}"
            shutdown -h +15
            break
            ;;
        "20")
            echo "${RED}you chose 20 minutes${NC}"
            shutdown -h +20
            break
            ;;
        "30")
            echo "${RED}you chose 30 minutes${NC}"
            shutdown -h +30
            break
            ;;
        "40")
            echo "${RED}you chose 40 minutes${NC}"
            shutdown -h +40
            break
            ;;
        "45")
            echo "${RED}you chose 45 minutes${NC}"
            shutdown -h +45
            break
            ;;
        "50")
            echo "${RED}you chose 50 minutes${NC}"
            shutdown -h +50
            break
            ;;
        "60")
            echo "${RED}you chose 60 minutes${NC}"
            shutdown -h +60
            break
            ;;
        "Quit")
            break
            ;;
        *) echo invalid option;;
    esac
done