<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
<style>
img {
position: absolute;
left: 0;
top: 10px;
z-index: -1;
}
</style>
</head>
<body>
<h2>Z-index property example</h2>
<img src="/build/images/w3docs-logo-black.png" alt="W3docs logo" width="200" height="100">
</body>
</html>