body {
    
    background-size: cover;
}

#snow {
    background: none;
    font-family: Androgyne;
    background-image:
        url('https://4.bp.blogspot.com/-RGdg1HwjcN0/V0MfveH5tnI/AAAAAAAAV9U/JuZAFpkJmHkhrLHTY3Nzt--f1_D4QUDRACLcB/s1600/s1.png'), url('https://3.bp.blogspot.com/-lLYG_aPYaWI/V0MfvZui2cI/AAAAAAAAV9Q/ivLLay21G6IKLLGEI-bHgpzmPRHFubhwgCLcB/s1600/s2.png'),
        url('https://3.bp.blogspot.com/-mPW9Z5fvV5w/V0MfvZ1kmnI/AAAAAAAAV9Y/qU7_F2J0XP4bXNi3rIyV55Y1z9RyTRoqQCLcB/s1600/s3.png');
    height: 80%;
    left: 0;
    position: absolute;
    top: 0;
    width: 100%;
    z-index: 2;
    -webkit-animation: snow 12s linear infinite;
    -moz-animation: snow 12s linear infinite;
    -ms-animation: snow 12s linear infinite;
    animation: snow 12s 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;
    }
}