<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>AQI</title>
    <style>
      body {
        padding: 1em;
        margin: 0;
        font-family: verdana;
      }

      button {
        font-size: 1.4em;
      }
    </style>
  </head>
  <body>
    <h1>AQI</h1>
    <p>Purple Air location:</p>
    <form method="GET">
      <p>
        <input id="sensor" name="sensor" type="text" />
        <input type="submit" value="Go" />
      </p>
    </form>
    <p>A