console
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=, initial-scale=">
<meta http-equiv="X-UA-Compatible" content="">
<title></title>
<style>
.fixed {
position: fixed;
height: 100vh;
width: 100vw;
background-color: #ccc;
display: flex;
align-items: center;
justify-content: center;
}
img {
width: 200px;
height: 200px;
}
</style>
</head>
<body>
<div class="fixed">
<img src="https://gw.alicdn.com/imgextra/i2/O1CN01UUrssj210KLs0sOOj_!!6000000006922-2-tps-480-480.png" alt="">
</div>
</body>
</html>