body{

background:url(images/background.png) no-repeat ;


}


.cloud4{

position:fixed;


}



.cloud1{

padding-top: 100px;
display: block;
    margin-left: auto;
    margin-right: auto;

}



.cloud2{

padding-top: 500px;
display: block;
    margin-left: auto;
    margin-right: auto;

}




.cloud3{

padding-top: 10px;
display: block;
    margin-left: auto;
    margin-right: auto;

}




.cloud4{
height:4000px;
background:url(images/cloud4.png) no-repeat;
width:2000px;
margin-left:-1500px;
left:75%;
z-index:-1;
margin-top: -600px;
}