wget helper

#!/bin/bash
URL="-i sites.txt"
ACCEPT='html,htm,css,js,php,jpg,png,jpeg,gif,bmp,img,ico,svg' #File Accept/Download List
DECLINE='tmp' #File Reject/Decline List
DIR="$HOME/Downloads/web/"

function downloadSite
{
    wget --no-clobber --convert-links --random-wait -r -p -E -e robots=off -U mozilla  -P $DIR $URL
}
function downlaod
{
    wget --no-clobber --convert-links --random-wait -r -p -E -e robots=off -U mozilla -r --retr-symlinks --no-hsts --no-check-certificate --no-parent --auth-no-challenge --no-cookies --ignore-length --no-cache --ignore-case --no-dns-cache --random-wait --no-use-server-timestamps -A "$ACCEPT" -R "$REJECT" --continue -P $DIR $URL
}
function spider
{
       wget -p -k -e robots=off -r --spider --retr-symlinks --no-hsts --no-check-certificate --no-parent --auth-no-challenge --no-cookies --save-headers --ignore-length --no-cache --ignore-case --no-dns-cache --random-wait --no-use-server-timestamps -A "$ACCEPT" -R "$REJECT" --continue -P $DIR $URL
}
#Infinate While Loop To Keep Menu Open At Bad Input
while : 
do
########Menu#########
    printf "Choose from the following operations:\n"
    printf "[1] wget Method 1 (Simple)\n"
    printf "[2] wget Method 2 (Exra Paramaters)\n"
    printf "[3] spider with wget\n"    
    read -p "Your choice: " op
    case $op in
    1)
        downloadSite
        break
    ;;

    2)
        downlaod
        break
    ;;
    3)
        spider
    ;;
    *)
        echo "invalid Input, Please Try Again."
    esac
done
echo -e "\nThank You For Using My Simple Script, Please Feel Free To Modify/Share It!\n"
exit 1