body{position:relative;background:#d2d2d2}body:after{content:'';display:block;position:absolute;z-index:2;top:0;left:0;right:0;bottom:0;pointer-events:none;background-image:url('https://websensepro.com/youtube/wp-content/uploads/2023/12/snow1.webp'),url('https://websensepro.com/youtube/wp-content/uploads/2023/12/snow2.webp'),url('https://websensepro.com/youtube/wp-content/uploads/2023/12/snow3.webp');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}}