<html>
<head>
    <style>
        body {
            margin: 0;
            height: 1100px;
        }
        .origin {
            position: absolute;
            top: 500px;
            left: 0;
            width: 10px;
            height: 10px;
            background-color: blue;
        }
        
        #indicator {
            position: absolute;
            left: 0;
            top: 0;
            width: 100px;
            height: 100px;
            background-color: green;
        }
    </style>
</head>
<body>
    <div class="origin"></div>
    <div id="indicator"></div>
    <div id="result"></div>
</body>
</html>