Where do you typically store your CSS files?
Everything is functioning properly http://jsfiddle.net/jsbot/cr5g6580/
Remember to paste it into the index.html file
<div id="clouds">
<div class="cloud x1"></div>
<!-- Let multiple clouds dance around -->
<div class="cloud x2"></div>
<div class="cloud x3"></div>
<div class="cloud x4"></div>
<div class="cloud x5"></div>
</div>
Also, add this content to style.css
/*Let's begin with establishing the cloud formation*/
/*The container will also act as the SKY*/
*{ margin: 0; padding: 0;}
body {
/*To prevent a horizontal scroll bar during animation*/
overflow: hidden;
}
#clouds{
padding: 100px 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%);
}
/*Final touches on 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;
}
/*Varied speed, opacity, and positions of clouds for realism*/
.x2 {
left: 200px;
-webkit-transform: scale(0.6);
-moz-transform: scale(0.6);
transform: scale(0.6);
opacity: 0.6; /*opacity based on size*/
/*Speed is proportional to size and opacity*/
/*Increase speed, decrease 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 based on 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 based on 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 based on 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;}
}