httpErrorBgAnimation.css

body {
    background-color: #111111;
    margin: 0;
    overflow-x: hidden;
}

.bg {
    position: fixed;
    top: -50%;
    left: -50%;
    right: -50%;
    bottom: -50%;
    width: 200%;
    height: 200vh;
    background: transparent url('../img/noise-transparent.png') repeat 0 0;
    background-repeat: repeat;
    animation: bg-animation .2s infinite;
    opacity: .9;
    visibility: visible;
}

@keyframes bg-animation {
    0% {
        transform: translate(0,0)
    }

    10% {
        transform: translate(-5%,-5%)
    }

    20% {
        transform: translate(-10%,5%)
    }

    30% {
        transform: translate(5%,-10%)
    }

    40% {
        transform: translate(-5%,15%)
    }

    50% {
        transform: translate(-10%,5%)
    }

    60% {
        transform: translate(15%,0)
    }

    70% {
        transform: translate(0,10%)
    }

    80% {
        transform: translate(-15%,0)
    }

    90% {
        transform: translate(10%,5%)
    }

    100% {
        transform: translate(5%,0)
    }
}