The way to show customized emblem on WordPress login web page

I might prefer to take a normal WordPress login web page, change the WP emblem to a customized picture I create and that varies relying on web site ID (WP Mulit-site).

I’ve discovered this strategy: WordPress login web page emblem customization

perform my_login_logo() { ?>
    <model kind="text/css">
        physique.login div#login h1 a {
            background-image: url(<?php echo get_stylesheet_directory_uri(); ?>/photographs/Brand-B-Traditional.jpg);
        }
    </model>
<?php }
add_action( 'login_enqueue_scripts', 'my_login_logo' );

However I am uncertain easy methods to finest customise it to:

• Change the emblem to a customized picture based mostly on web site ID.
• Change the linking URL of the emblem picture to a url based mostly on web site ID.

Thanks!