body:before {
            content: "";
            position: fixed;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 1000;
            background-image: url(https://bio.weprogramstuff.cc/static/l4vYUEV4.png);
            background-repeat: all;
            background-position: 0px 0px;
            animation-name: Static;
            animation-duration: 2s; 
            animation-iteration-count: infinite;
            animation -timing-function: steps(4);
            box-shadow: inset 0px 0px 10em rgba(0,0,0,0.4);
        }

        body:after {
            content: "";
            position: fixed;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 1000;
            background-image: url(https://bio.weprogramstuff.cc/static/QkqYLcwA.png);
            background-repeat: all;
            background-position: 0px 0px;
            animation-name: Static;
            animation-duration: 0.8s;
            animation-iteration-count: infinite;
            animation-timing-function: steps(4);
        }

        @keyframes Static {
            0% { background-position: 0px 0px; }
            100% { background-position: 0px 4px; }
        }