/* KEYFRAMES */

@-webkit-keyframes animateCloud {
    0% {
        margin-left: -1000px;
    }

    100% {
        margin-left: 100%;
    }
}

@-moz-keyframes animateCloud {
    0% {
        margin-left: -1000px;
    }

    100% {
        margin-left: 100%;
    }
}

@keyframes animateCloud {
    0% {
        margin-left: -1000px;
    }

    100% {
        margin-left: 100%;
    }
}

/* ANIMATIONS */

.x1 {
    -webkit-animation: animateCloud 39s linear infinite;
    -moz-animation: animateCloud 39s linear infinite;
    animation: animateCloud 39s linear infinite;
    -webkit-transform: scale(0.65);
    -moz-transform: scale(0.65);
    transform: scale(0.65);
}

.x2 {
    -webkit-animation: animateCloud 26s linear infinite;
    -moz-animation: animateCloud 26s linear infinite;
    animation: animateCloud 26s linear infinite;
    -webkit-transform: scale(0.3);
    -moz-transform: scale(0.3);
    transform: scale(0.3);
}

.x3 {
    -webkit-animation: animateCloud 32s linear infinite;
    -moz-animation: animateCloud 32s linear infinite;
    animation: animateCloud 32s linear infinite;
    -webkit-transform: scale(0.5);
    -moz-transform: scale(0.5);
    transform: scale(0.5);
}

.x4 {
    -webkit-animation: animateCloud 25s linear infinite;
    -moz-animation: animateCloud 25s linear infinite;
    animation: animateCloud 25s linear infinite;
    -webkit-transform: scale(0.4);
    -moz-transform: scale(0.4);
    transform: scale(0.4);
}

.x5 {
    -webkit-animation: animateCloud 29s linear infinite;
    -moz-animation: animateCloud 29s linear infinite;
    animation: animateCloud 29s linear infinite;
    -webkit-transform: scale(0.55);
    -moz-transform: scale(0.55);
    transform: scale(0.55);
}

.x6 {
    -webkit-animation: animateCloud 37s linear infinite;
    -moz-animation: animateCloud 37s linear infinite;
    animation: animateCloud 37s linear infinite;
    -webkit-transform: scale(0.5);
    -moz-transform: scale(0.5);
    transform: scale(0.5);
}

.x7 {
    -webkit-animation: animateCloud 23s linear infinite;
    -moz-animation: animateCloud 23s linear infinite;
    animation: animateCloud 23s linear infinite;
    -webkit-transform: scale(0.4);
    -moz-transform: scale(0.4);
    transform: scale(0.4);
}

.x8 {
    -webkit-animation: animateCloud 33s linear infinite;
    -moz-animation: animateCloud 33s linear infinite;
    animation: animateCloud 33s linear infinite;
    -webkit-transform: scale(0.25);
    -moz-transform: scale(0.25);
    transform: scale(0.25);
}

.x9 {
    -webkit-animation: animateCloud 27s linear infinite;
    -moz-animation: animateCloud 27s linear infinite;
    animation: animateCloud 27s linear infinite;
    -webkit-transform: scale(0.35);
    -moz-transform: scale(0.35);
    transform: scale(0.35);
}

.x10 {
    -webkit-animation: animateCloud 21s linear infinite;
    -moz-animation: animateCloud 21s linear infinite;
    animation: animateCloud 21s linear infinite;
    -webkit-transform: scale(0.45);
    -moz-transform: scale(0.45);
    transform: scale(0.45);
}

/* OBJECTS */

.cloud {
    background: rgb(50, 50, 50);
    background: -moz-linear-gradient(top, rgb(50, 50, 50) 5%, rgb(50, 50, 50) 100%);
    background: -webkit-gradient(linear, left top, left bottom, color-stop(5%,rgb(50, 50, 50)), color-stop(100%,rgb(50, 50, 50)));
    background: -webkit-linear-gradient(top, rgb(50, 50, 50) 5%,rgb(50, 50, 50) 100%);
    background: -o-linear-gradient(top, rgba(128, 128, 128, 0.27) 5%,rgba(128, 128, 128, 0.27) 100%);
    background: -ms-linear-gradient(top, rgb(50, 50, 50) 5%,rgb(50, 50, 50) 100%);
    background: linear-gradient(top, rgb(50, 50, 50) 5%,rgb(50, 50, 50) 100%);
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#fff', endColorstr='#f1f1f1',GradientType=0 );
    -webkit-border-radius: 100px;
    -moz-border-radius: 100px;
    border-radius: 100px;
    -webkit-box-shadow: 0 8px 5px rgba(0, 0, 0, 0.1);
    -moz-box-shadow: 0 8px 5px rgba(0, 0, 0, 0.1);
    box-shadow: 0 8px 5px rgba(0, 0, 0, 0.1);
    height: 120px;
    position: relative;
    width: 350px;
}

    .cloud:after, .cloud:before {
        background: rgb(50, 50, 50);
        content: '';
        position: absolute;
        z-indeX: -1;
    }

    .cloud:after {
        -webkit-border-radius: 100px;
        -moz-border-radius: 100px;
        border-radius: 100px;
        height: 100px;
        left: 50px;
        top: -50px;
        width: 100px;
    }

    .cloud:before {
        -webkit-border-radius: 200px;
        -moz-border-radius: 200px;
        border-radius: 200px;
        width: 180px;
        height: 180px;
        right: 50px;
        top: -90px;
    }