<div class="wrapper">
  <div class="div1"></div>
  <div class="div2"></div>
  <div class="div3"></div> 
</div>



.wrapper {
}

.div1 {
  position: absolute;
  top: 0px;
  left: 0px;
  width: 100px;
  height: 100px;
  background-color: red;
} 

.div2 {
  position: absolute;
  top: 10px;
  left: 10px;
  width: 100px;
  height: 100px;
  background-color: green;
} 

.div3 {
  position: absolute;
  top: 20px;
  left: 20px;
  width: 100px;
  height: 100px;
  background-color: blue;
}
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