$.getScript("/datajs/jquery.bgswitcher.js", function(){
    $('.backloop').bgSwitcher({
        images: ['https://www.sankyo-transport.jp/dataimge/1611987929.jpg','https://www.sankyo-transport.jp/dataimge/1611987940.jpg','https://www.sankyo-transport.jp/dataimge/1611987951.jpg'], 
        interval: 4000, 
        loop: true, 
        shuffle: false, 
        effect: "fade", 
        duration: 1000, 
        easing: "swing",
    });
});