.snow {
   display: block; 
   overflow: hidden; 
   position: relative;
   min-height: 100vh; 
   margin: 0; 
   padding: 0;
    background: #0c0c0c url( 'https://wallpaper-house.com/data/out/10/wallpaper2you_401725.png' ) center bottom no-repeat;
   background-size: cover;

}

canvas {
   display: block; 
   background-color: transparent; 
   margin: 0; 
   padding: 0;
   opacity: 1; 
}