SOURCE

<div class="block1"></div>
<div class="block2"></div>
<div class="block3"></div>
<div class="block4"></div>
<div class="block5"></div>
<div class="block6"></div>
<div class="block7"></div>
<div class="block8"></div>
<div class="block9"></div>
<div class="block10"></div>

div{
  width:100px;
  background-color:#ddd;
  margin-top:10px;
  margin-left:10px;
  display:inline-block;
}
.block1{height:200px}
.block2{height:300px}
.block3{height:200px}
.block4{height:100px}
.block5{height:300px}
.block6{height:200px}
.block7{height:50px}
.block8{height:120px}
.block9{height:80px}
.block10{height:180px}