.sky {
    width: 100%;
    height: 100%;
    background: #007fd5;
    position: absolute;
    overflow: hidden;
    -webkit-animation: sky_background 25s linear infinite;
    -moz-animation: sky_background 25s linear infinite;
    -o-animation: sky_background 25s linear infinite;
    -webkit-transform: translate3d(0, 0, 0);
    -moz-transform: translate3d(0, 0, 0);
    -o-transform: translate3d(0, 0, 0)
}

@-webkit-keyframes cloud_one {
    0% {
        left: 0
    }
    100% {
        left: -200%
    }
}
@-moz-keyframes cloud_one {
    0% {
        left: 0
    }
    100% {
        left: -200%
    }
}

.clouds_one {
    background: url("../images/Layer11.jpg");
    position: absolute;
    left: 0;
    top: 0;
    height: 200%;
    width: 300%;
    -webkit-animation: cloud_one 25s linear infinite;
    -moz-animation: cloud_one 25s linear infinite;
    -o-animation: cloud_one 25s linear infinite;
    -webkit-transform: translate3d(0, 0, 0);
    -moz-transform: translate3d(0, 0, 0);
    -o-transform: translate3d(0, 0, 0)
}