w3 setting background image as cover code example
Example 1: html background image
<!-- Code by Scratchy -->
<!-- Twitter: @S_cratchy-->
<head>
<style>
body {
background-image: url(https://wallup.net/wp-content/uploads/2019/09/110394-cats-grey-kittens-fluffy-fat-grass-animals-cat-kitten-baby-cute-748x468.jpg)
}
</style>
<body>
You have set the background image!
</body>
Example 2: body background image in html
body {
background-image: url('img_girl.jpg');
}