$(document).ready(function() {
    setTimeout("cloudone()",10);
    setTimeout("cloudtwo()",10);
    setTimeout("cloudthree()",10);
});
function cloudone(){
    $("#cloudone").animate({left:"+=1400px"},10000).animate({left:"-200px"}, 0)
    setTimeout("cloudone()",10000)
}
function cloudtwo(){
    $("#cloudtwo").animate({left:"+=1600px"},15000).animate({left:"-300px"}, 0)
    setTimeout("cloudtwo()",15000)
}
function cloudthree(){
    $("#cloudthree").animate({left:"+=2200px"},20000).animate({left:"-600px"}, 0)
    setTimeout("cloudthree()",20000)
}