Simple snippet code got the job done.
Sorry for my post...
If someone is to need it to (paste in function.php):
function my_login_logo_one() {
?>
<style type="text/css">
body.login div#login h1 a {
background-image: url(http://localhost/wordpress/one.jpeg); //Add your own logo image in this url
padding-bottom: 30px;
}
</style>
<?php
} add_action( 'login_enqueue_scripts', 'my_login_logo_one' );