@-webkit-keyframes snow { 
    0% { background-position: 0px 0px, 0px 0px, 0px 0px }
    100% {
        background-position: 500px 1000px, 400px 400px, 300px 300px;
    }
}
@-moz-keyframes snow {  
    0% { background-position: 0px 0px, 0px 0px, 0px 0px }
    100% {
        background-position: 500px 1000px, 400px 400px, 300px 300px;
    }
}
@-ms-keyframes snow {  
    0% { background-position: 0px 0px, 0px 0px, 0px 0px }
    100% {
        background-position: 500px 1000px, 400px 400px, 300px 300px;
    }
}
@keyframes snow {  
    0% { background-position: 0px 0px, 0px 0px, 0px 0px }
    100% {
        background-position: 500px 1000px, 400px 400px, 300px 300px;
    }
}
body {
    background-image: url('../../images/xmas/BiSmXaq.png'), url('../../images/xmas/XHuy0NJ.png'), url('../../images/xmas/okpRxJU.png');
    -webkit-animation: snow 20s linear infinite;
    -moz-animation: snow 20s linear infinite;
    -ms-animation: snow 20s linear infinite;
    animation: snow 20s linear infinite;
}