#clouds{
	padding: 100px 0;
}

/*Time to finalise the cloud shape*/
.cloud {

	position: relative; 
}

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

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

/*Time to animate*/
.x1 {
	-webkit-animation: moveclouds 45s linear infinite;
	-moz-animation: moveclouds 45s linear infinite;
	-o-animation: moveclouds 45s linear infinite;
}

/*variable speed, opacity, and position of clouds for realistic effect*/
.x2 {

	-webkit-transform: scale(1.5);
	-moz-transform: scale(0.6);
	transform: scale(0.6);
	
	/*Speed will also be proportional to the size and opacity*/
	/*More the speed. Less the time in 's' = seconds*/
	-webkit-animation: moveclouds 100s linear infinite;
	-moz-animation: moveclouds 100s linear infinite;
	-o-animation: moveclouds 100s linear infinite;
}

.x3 {
	-webkit-transform: scale(0.8);
	-moz-transform: scale(0.8);
	
	-webkit-animation: moveclouds 150s linear infinite;
	-moz-animation: moveclouds 150s linear infinite;
	-o-animation: moveclouds 150s linear infinite;
}

.x4 {
	
	-webkit-transform: scale(0.75);
	-moz-transform: scale(0.75);
	transform: scale(0.75);
	
	-webkit-animation: moveclouds 100s linear ;
	-moz-animation: moveclouds 100s linear ;
	-o-animation: moveclouds 100s linear ;
}

.x5 {
	margin-top: -70%;
	-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 80s linear ;
	-moz-animation: moveclouds 80s linear ;
	-o-animation: moveclouds 80s linear ;
}


@-webkit-keyframes moveclouds {
	0% {margin-left: 110%;}
	100% {margin-left: -50%;}
}
@-moz-keyframes moveclouds {
	0% {margin-left: 110%;}
	100% {margin-left: --50%;}
}
@-o-keyframes moveclouds {
	0% {margin-left: 110%;}
	100% {margin-left: --50%;}
}

@-webkit-keyframes moveonce {
	0% {margin-left: 10%;}
	100% {margin-left: -50%;}
}
@-moz-keyframes moveonce {
	0% {margin-left: 10%;}
	100% {margin-left: -50%;}
}
@-o-keyframes moveonce {
	0% {margin-left: 10%;}
	100% {margin-left: -50%;}
}