div#warstwa1 {
  z-index:1;
  position:absolute;
  top:10px;
  left:10px;
  width:200px;
  height:100px;
  background-color:#ffffff;
  border:1px solid #000000;
  padding:5px;}

div#warstwa2 {
  z-index:2;
  position:absolute;
  top:20px;
  left:20px;
  width:200px;
  height:100px;
  background-color:#ffffff;
  border:1px solid #000000;
  padding:5px;}

div#warstwa3 {
  z-index:3;
  position:absolute;
  top:30px; 
  left:30px;
  width:200px;
  height:100px;
  background-color:#ffffff;
  border:1px solid #000000;
  padding:5px;}
