<!DOCTYPE html>
<html lang="en-US">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width">
    <title>Simple clearing example</title>
    <style>
      body {
        width: 90%;
        max-width: 900px;
        margin: 0 auto;
        font: .9em/1.2 Arial, Helvetica, sans-serif
      }

      .box {
        float: left;
        margin-right: 15px;
        width: 150px;
        height: 150px;
        border-radius: 5px;
        background-color: rgb(207,232,220);
      