#!/bin/bash

LIST() {
        echo "Listing"
}

SIGNON() {
        echo "Signing On"
}

SIGNOFF() {
        echo "Signing Off"
}

DISPLAY() {
        echo "Displaying"
}

select choice in \
        "list file names in current directory" \
        "signon" \
        "signoff" \
        "display the time and date"
do
        echo "Choice: $choice"
        echo "Reply: $REPLY"

        case $REPLY in
        1)
                LIST
                ;;
        2)
                SIGNON
                ;;
        3)
                SIGNOFF
                ;;
        4)
                DISPLAY
                ;;
        *)
                break
                ;;
        esac
        sleep 3
        clear
done