e: 50px;
    position: absolute;
    left: 30px;
    top: 50px;
  }
  #d1 span {
    color: red;
    background: red;
    float: left;
  }
  #d2::first-letter {
    color: green;
    background: green;
    float: left;
  }
  </style>
</head>
<body>
  <p>Test passes if there is a <strong>filled green rectangle</strong> and <strong>no red</strong>.</p>
  <div id="d1"><span>a</span></div>
  <div id="d2">a</div>
</body>
</html>
