background_slideshow.css

#bgol 
{
    top:0;
    left:0;
    width:100%;
    height:100%;
    position:fixed;
    z-index:-100;
    background:rgb(0 24 24/85%);
}

#bgimg 
{
    background-size:cover;
    top:0;
    left:0;
    z-index:-200;
    width:100%;
    height:100%;
    position:fixed;
}