<!DOCTYPE html>
<style>
img { 
  background-color: blue;
  width: 50px;
  height: 100px;
}

.floatBox { 
  float: left;
  width: 50px;
  height: 50px;
  background-color: green;
}
</style>
<div class="container"><div class=floatBox></div><div class=floatBox style="width: 100px; clear: left;"></div><img></div>