function wolken_s(){
	$('#wolken_s').animate({ backgroundPosition: "650px 0px" }, 60000, 'linear', function() {
      $('#wolken_s').animate({ backgroundPosition: "0px 0px" }, 1, 'linear' );
      wolken_s();
  	});
}

function wolken_m(){
	$('#wolken_m').animate({ backgroundPosition: "650px 0px" }, 40000, 'linear', function() {
      $('#wolken_m').animate({ backgroundPosition: "0px 0px" }, 1, 'linear');
      wolken_m();
  	});
}

function wolken_l(){
	$('#wolken_l').animate({ backgroundPosition: "650px 0px" }, 20000, 'linear', function() {
      $('#wolken_l').animate({ backgroundPosition: "0px 0px" }, 1, 'linear');
      wolken_l();
  	});
}

$(document).ready(function() {
	wolken_s();
	wolken_m();
	wolken_l();

	
});