@keyframes snow-animation { 
0% { background-position: 0px 0px, 0px 0px, 0px 0px }
100% { background-position: 500px 1000px, 400px 400px, 300px 300px }
}
@-moz-keyframes snow-animation { 
0% { background-position: 0px 0px, 0px 0px, 0px 0px }
100% { background-position: 500px 1000px, 400px 400px, 300px 300px }
}
@-webkit-keyframes snow-animation { 
0% { background-position: 0px 0px, 0px 0px, 0px 0px }
100% {
background-position: 500px 1000px, 400px 400px, 300px 300px;
}
}
@-ms-keyframes snow-animation { 
0% { background-position: 0px 0px, 0px 0px, 0px 0px }
100% { background-position: 500px 1000px, 400px 400px, 300px 300px }
}