.snowflake {
position: fixed;
top: -10px;
color: white;
pointer-events: none;
animation-name: fall;
animation-timing-function: linear;
animation-iteration-count: infinite;
}
@keyframes fall {
0% {
    transform: translateY(0) rotate(0deg);
}
100% {
    transform: translateY(100vh) rotate(360deg);
}
}