<!doctype html>
<style>
.test {
  background-color: green;
  width: 30px;
  height: 30px;
  margin: 10px;
}
</style>
<div id="host1" class="test"> </div>
<div id="host2" class="test"> </div>
<div id="host3" class="test"> </div>
<div id="host4" class="test"> </div>
<div id="host5" class="test"> </div>
<div id="host6" class="test"> </div>
<div id="host5" class="test"> </div>
<div id="host6" class="test"> </div>