.bg-clouds {
    background-color: hsla(200, 40%, 30%, .4);
    background-image:

        url('/img/cloudblooma.png'),
        url('/img/cloudbloomb.png');
    background-repeat: repeat-x;
    background-position:
        0 20%,
        0 100%,
        0 50%,
        0 100%,
        0 0;
    background-size:
        2500px,
        800px,
        500px 200px,
        1000px,
        400px 260px;
    animation: 50s para infinite linear;
}

@keyframes para {
    100% {
        background-position:
            -5000px 20%,
            -800px 95%,
            500px 50%,
            1000px 100%,
            400px 0;
    }
}