.preframe {
            position: fixed;
            left: 0px;
            top: 0px;
            width: 100%;
            height: 100%;
            z-index: 9999;
            pointer-events: none;
        }
        
        .prebg {
            position: fixed;
            left: 0px;
            top: 0px;
            width: 100%;
            height: 100%;
            z-index: 999;
            pointer-events: none;
        }
        
        .zoom {
            animation-name: zoom;
            animation-duration: 1.5s;
            animation-iteration-count: infinite;
            animation-timing-function: ease-in-out
        }
        
        @keyframes zoom {
            from {}
            55% {
                transform: scale(0.9);
            }
            to {}
        }