Adding text below slider

I’m a beginner. I’ve added this to the custom CSS with my content between the ‘ ‘ and get nothing showing on my page. Any idea on what I might be doing wrong? Thanks.

add_filter(‘tc_slider_display’, ‘content_after_slider’);
function content_after_slider($html) {
$after_slider = ”; //Put your HTML inside this var
return $html.$after_slider;
}