* {
    margin: 0;
    padding: 0;
}

body {
    text-align: center;
    overflow: hidden;
    font: 20px Helvetica, sans-serif;
    color: #333;
}

h1 {
    font-size: 50px;
}

article {
    display: block;
    text-align: left;
    width: 650px;
    margin: 0 auto;
}

a {
    color: #dc8100;
    text-decoration: none;
}

a:hover {
    color: #333;
    text-decoration: none;
}

#clouds{
    padding: 0;
    background: #c9dbe9;
    background: -webkit-linear-gradient(top, #c9dbe9 0%, #fff 100%);
    background: -linear-gradient(top, #c9dbe9 0%, #fff 100%);
    background: -moz-linear-gradient(top, #c9dbe9 0%, #fff 100%);
}

/*Time to finalise the cloud shape*/
.cloud {
    width: 200px; height: 60px;
    background: #fff;

    border-radius: 200px;
    -moz-border-radius: 200px;
    -webkit-border-radius: 200px;

    position: relative;
}

.cloud:before, .cloud:after {
    content: '';
    position: absolute;
    background: #fff;
    width: 100px; height: 80px;
    position: absolute; top: -15px; left: 10px;

    border-radius: 100px;
    -moz-border-radius: 100px;
    -webkit-border-radius: 100px;

    -webkit-transform: rotate(30deg);
    transform: rotate(30deg);
    -moz-transform: rotate(30deg);
}

.cloud:after {
    width: 120px; height: 120px;
    top: -55px; left: auto; right: 15px;
}

/*Time to animate*/
.x1 {
    -webkit-animation: moveclouds 15s linear infinite;
    -moz-animation: moveclouds 15s linear infinite;
    -o-animation: moveclouds 15s linear infinite;
}

/*variable speed, opacity, and position of clouds for realistic effect*/
.x2 {
    left: 200px;

    -webkit-transform: scale(0.6);
    -moz-transform: scale(0.6);
    transform: scale(0.6);
    opacity: 0.6; /*opacity proportional to the size*/

    /*Speed will also be proportional to the size and opacity*/
    /*More the speed. Less the time in 's' = seconds*/
    -webkit-animation: moveclouds 25s linear infinite;
    -moz-animation: moveclouds 25s linear infinite;
    -o-animation: moveclouds 25s linear infinite;
}

.x3 {
    left: -250px; top: -200px;

    -webkit-transform: scale(0.8);
    -moz-transform: scale(0.8);
    transform: scale(0.8);
    opacity: 0.8; /*opacity proportional to the size*/

    -webkit-animation: moveclouds 20s linear infinite;
    -moz-animation: moveclouds 20s linear infinite;
    -o-animation: moveclouds 20s linear infinite;
}

.x4 {
    left: 470px; top: -250px;

    -webkit-transform: scale(0.75);
    -moz-transform: scale(0.75);
    transform: scale(0.75);
    opacity: 0.75; /*opacity proportional to the size*/

    -webkit-animation: moveclouds 18s linear infinite;
    -moz-animation: moveclouds 18s linear infinite;
    -o-animation: moveclouds 18s linear infinite;
}

.x5 {
    left: -150px; top: -150px;

    -webkit-transform: scale(0.8);
    -moz-transform: scale(0.8);
    transform: scale(0.8);
    opacity: 0.8; /*opacity proportional to the size*/

    -webkit-animation: moveclouds 20s linear infinite;
    -moz-animation: moveclouds 20s linear infinite;
    -o-animation: moveclouds 20s linear infinite;
}

@-webkit-keyframes moveclouds {
    0% {margin-left: 1000px;}
    100% {margin-left: -1000px;}
}

@-moz-keyframes moveclouds {
    0% {margin-left: 1000px;}
    100% {margin-left: -1000px;}
}

@-o-keyframes moveclouds {
    0% {margin-left: 1000px;}
    100% {margin-left: -1000px;}
}