#!/bin/bash

RED_COLOR="\E[1;31m"

GREEN_COLOR="\E[1;32m"

YELLOW_COLOR="\E[1;33m"

BLUE_COLOR="\E[1;34m"

RES="\E[0m"

function usage(){

        echo "USAGE: $0 {1|2|3|4}"

        exit

}

function menu(){

        cat << END

                =============================

                .apple

                .pear

                .banana

                .cherry

                =============================

END

}

function choice(){

read -p "Please input a number to choice." num

case $num in

        )

                echo -e "${RED_COLOR}apple${RES}"

                ;;

        )

                echo -e "${GREEN_COLOR}pear${RES}"

                ;;

        )

                echo -e "${YELLOW_COLOR}banana${RES}"

                ;;

        )

                echo -e "${BLUE_COLOR}cherry${RES}"

                ;;

        *)

                usage

esac

}

function main(){

        menu

        choice

}

main