Using Marquee Template in 7.O

Site URL: https://www.secretariatcenter.org/horses/sua-sorella

Can anyone help me with the code for adding an image banner to the marquee template footer? 

Hi. Add to Design > Custom CSS

footer#footer {
    background-image: url(https://cdn.pixabay.com/photo/2022/05/24/04/38/study-7217599__480.jpg);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center center;
}