html {
    background: url(test-pattern-152459_1280.png) no-repeat center center fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    font-family: sans-serif;
}

#marquee {
    margin-top: 38%;
    margin-bottom: 2em;
    background-color: white;
    width: 100%;
    max-width: 100vw;
    white-space: nowrap;
    overflow: hidden;
}

#marquee span {
    display: inline-block;
    padding-left: 105%;
    animation: marquee 15s linear infinite;
}

@keyframes marquee {
    0%  { transform: translateX(0); }
    100%    { transform: translateX(-100%); }
}