custom htaccess file

I have one website, and I want visitors to see two different versions of site according to their IP number. I want this to be done by htaccess file. So, I need someone who can edit htaccess file like: general visitors will view an index page in a subdirectory. visitor from x country (ip addresses will be provided) will be redirected to another directory, but the visitor from x country will no access to other index page. It only takes few minutes for someone who knows coding.