<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
body {
overflow: hidden;
margin: 0;
}
div {
width: 100vw;
height: 100vh;
box-sizing: border-box;
border: 1px solid #ccc;
background:
linear-gradient(90deg, transparent 15px, #ccc 16px),
linear-gradient(180deg, transparent 15px, #ccc 16px);
background-size: 16px 16px;
}
</style>
<div></div>