Preview:
document.addEventListener("DOMContentLoaded", function () {

    let bgSlideShows = document.querySelectorAll('#bgslideshow01 > .slideshow');
    let myIndex = 1;
    
    function slideShow() {
        bgSlideShows.forEach(slide => {
            slide.style.display = 'none';
        });
        bgSlideShows[myIndex - 1].style.display = 'block';
        if (myIndex === bgSlideShows.length) {
            myIndex = 1;
        }
        myIndex++;
        setTimeout(slideShow, 7000);
    }
    slideShow();
   
});
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