<style>
#header{
background-image: url('https://www.xxxxxxxxxxxxxxxxxxxx.com/forum/styles/default/xenforo/s1.png'), url('https://www.xxxxxxxxxxxxxxxxxx.com/forum/styles/default/xenforo/s2.png'), url('https://www.xxxxxxxxxxxxxxxxxx.com/forum/styles/default/xenforo/s3.png');
width: 100%;
z-index:1;
-webkit-animation: snow 10s linear infinite;
-moz-animation: snow 10s linear infinite;
-ms-animation: snow 10s linear infinite;
animation: snow 10s linear infinite;
}
@keyframes snow {
0% {background-position: 0px 0px, 0px 0px, 0px 0px;}
50% {background-position: 500px 500px, 100px 200px, -100px 150px;}
100% {background-position: 500px 1000px, 200px 400px, -100px 300px;}
}
@-moz-keyframes snow {
0% {background-position: 0px 0px, 0px 0px, 0px 0px;}
50% {background-position: 500px 500px, 100px 200px, -100px 150px;}
100% {background-position: 400px 1000px, 200px 400px, 100px 300px;}
}
@-webkit-keyframes snow {
0% {background-position: 0px 0px, 0px 0px, 0px 0px;}
50% {background-position: 500px 500px, 100px 200px, -100px 150px;}
100% {background-position: 500px 1000px, 200px 400px, -100px 300px;}
}
@-ms-keyframes snow {
0% {background-position: 0px 0px, 0px 0px, 0px 0px;}
50% {background-position: 500px 500px, 100px 200px, -100px 150px;}
100% {background-position: 500px 1000px, 200px 400px, -100px 300px;}
}
</style>