
     <style>
 /* Preloader CSS. Change the background color by swapping out #fff in the background property. You can also find more preloader icons here: https://samherbert.net/svg-loaders/  */
        #preloader {
        align-items: center;
        justify-content: center;
        width: 100%;
        display: flex;
        position: fixed;
        height: 100vh;
        left: 0;
        top: 0;
        background: #999
          url("https://samherbert.net/svg-loaders/svg-loaders/spinning-circles.svg")
          no-repeat center;
        z-index: 9999;
    }
    </style>