body{
    margin: 0;
    padding: 0;
    background: #2980b9 url('https://static.tumblr.com/03fbbc566b081016810402488936fbae/pqpk3dn/MRSmlzpj3/tumblr_static_bg3.png') repeat 0 0;
    background-size: contain;
    background-attachment: fixed;
    -webkit-animation: 50s linear 0s normal none infinite animate;
    -moz-animation: 50s linear 0s normal none infinite animate;
    -ms-animation: 50s linear 0s normal none infinite animate;
    -o-animation: 50s linear 0s normal none infinite animate;
    animation: 50s linear 0s normal none infinite animate;
}

@-webkit-keyframes animate {
    from {background-position: 0 0;}
    to {background-position: 1000px 0;}
}

@-moz-keyframes animate{
    from {background-position: 0 0;}
    to {background-position: 1000px 0;}
}

@-ms-keyframes animate {
    from {background-position: 0 0;}
    to {background-position: 1000px;}
}

@-o-keyframes animate {
    from {background-position: 0 0;}
    to {background-position: 1000px 0;}
}

@keyframes animate {
    from {background-position: 0 0;}
    to {background-position: 1000px 0;}
}