Nmap bash with gui

#!/bin/bash

# Clear the screen
clear

# Display header
cat << "EOF"
   \  |        \  |    \     _ \   __ )             |        ____|
    \ |       |\/ |   _ \   |   |  __ \   __| |   | __|  _ \ |    _ \   __| __|  _ \  __|
  |\  |_____| |   |  ___ \  ___/   |   | |    |   | |    __/ __| (   | |   (     __/ |
 _| \_|      _|  _|_/    _\_|     ____/ _|   \__,_|\__|\___|_|  \___/ _|  \___|\___|_|   V. - 0.1

 Inspiration from:@Harshil Patel & @Ashish Kunwar aka dorkerdevil
EOF

# Root privilege check
if [ "$(id -u)" -ne 0 ]; then
    echo -e "\n[!] This script must be run as \033[1;31mroot\033[0m.\n"
    exit 1
fi

# Menu loop
while true; do
    echo -e "\nChoose an option:"
    echo "1) FTP"
    echo "2) AFP"
    echo "3) Telnet"
    echo "4) SMTP"
    echo "5) AJP"
    echo "6) Cassandra"
    echo "7) Citrix"
    echo "8) CVS"
    echo "9) distcc (CVE-2004-2687)"
    echo "10) DNS"
    echo "11) HTTP"
    echo "12) HTTP-Form"
    echo "0) Exit"

    # Get user choice
    read -p "Enter your choice: " choice

    case $choice in
    0)
        echo "Exiting script."
        exit 0
        ;;
    1)
        read -p "Enter the target: " target
        nmap -p 21 --script ftp-brute "$target" -d
        ;;
    2)
        read -p "Enter the target: " target
        nmap -p 548 --script afp-bruteforce "$target"
        ;;
    3)
        read -p "Enter the target: " target
        nmap -p 23 --script telnet-brute "$target" -d
        ;;
    4)
        read -p "Enter the target: " target
        nmap -p 25 --script smtp-brute "$target" -d
        ;;
    5)
        read -p "Enter the target: " target
        nmap -p 8009 "$target" --script ajp-brute
        ;;
    6)
        read -p "Enter the target: " target
        nmap -p 9160 "$target" --script cassandra-brute
        ;;
    7)
        read -p "Enter UserList file (userdb): " userdb
        read -p "Enter PasswordList file (passdb): " passdb
        read -p "Enter Domain Name (ntdomain): " ntdomain
        read -p "Enter Host Name: " host
        nmap --script citrix-brute-xml --script-args="userdb=$userdb,passdb=$passdb,ntdomain=$ntdomain" -p 80,443,8080 "$host"
        ;;
    8)
        read -p "Enter the host: " host
        nmap -p 2401 --script cvs-brute "$host"
        ;;
    9)
        read -p "Enter the target: " target
        nmap -p 3632 "$target" --script distcc-exec --script-args="distcc-exec.cmd='id'"
        ;;
    10)
        read -p "Enter the target: " target
        nmap --script dns-brute "$target"
        ;;
    11)
        read -p "Enter the host: " host
        nmap --script http-brute -p 80 "$host"
        ;;
    12)
        read -p "Enter the host: " host
        nmap --script http-form-brute -p 80 "$host"
        ;;
    *)
        echo "Invalid option. Please try again."
        ;;
    esac
done