Styling "Read more"

Hi,

I’ve been playing around with this code:

function new_excerpt_more($more) {
global $post;
return ‘ID) . ‘”>’ . ‘Read the Rest…’ . ‘‘;
}
add_filter(‘excerpt_more’, ‘new_excerpt_more’);

I’ve been attempting to style the “read more” but haven’t been successful. Any advice would be helpful.

Thank you!