Modifiying a string in an HTML file then renaming it several times from an array list

How can I find a string in an HTML file whenever it is used and replace it (similar to ctrl + h = replace), then rename this file with the same string modified by creating new copy of the initial file, than repeat this steps from a list of strings.

I tried this code but not working:

    @echo off
    echo.
    if NOT "%2"=="" goto next1

    echo %0 will make the specified number of copies of a file to (by default) the current folder
    echo The copies will have '(Copy n) ' added at the beginning of the filename, where 'n' is the count
    echo .
    echo Useage: %0 copies source_file [destination folder]
    echo example: %0 10 test.txt C:temp
    goto end

    :next1
    if EXIST ".%2" goto next2
    echo file %2 not found
    goto end

    :next2
    set count=%1
    set destination=%3
    if "%3"=="" set destination=.

    :repeat
    @echo on
    copy %2 "%destination%(Copy %count%) %2"
    @echo off
    pause

    set /a count=%count%-1 
    if %count% LEQ 0 echo Requested number of copies (%1) have been made.
    if %count% LEQ 0 goto end

    goto repeat

    :end
`