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<!DOCTYPE html>
<html>
<head>
<style>
.container {
width: 200px;
height: 200px;
overflow: scroll;
position: relative;
}
</style>
</head>
<body>
<div class="container">
<div style="width: 10px; height: 10px; left: 0px; top: 60px; background: white; position: absolute; z-index: 1;"></div>
<div style="background: green; height: 40px;"></div>
<div style="height: 300px;"></div>
</div>
</body>
</html>