<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
html, body {
padding: 0;
margin: 0;
}
body {
height: 100vh;
width: 100vw;
background: #08304A;
overflow: auto;
border: 1px solid transparent;
}
.intro {
position: relative;
color: #fff;
width: 200px;
height: 400px;
margin-top: 200px;
margin-left: 200px;
}
.intro > span {
position: absolute;
width: 10px;
height: 10px;
}
.lpArrow {
border-top: 1px solid #00F6E5;
border-left: 1px solid #00F6E5;
}
.rpArrow {
right: 0;
border-top: 1px solid #00F6E5;
border-right: 1px solid #00F6E5;
}
.lbArrow {
bottom: 0;
border-left: 1px solid #00F6E5;
border-bottom: 1px solid #00F6E5;
}
.rbArrow {
right: 0;
bottom:0;
border-right: 1px solid #00F6E5;
border-bottom: 1px solid #00F6E5;
}
</style>
</head>
<body>
<div class="intro" style="background: rgba(255,255,255,0.1)">
<span class="lpArrow"></span>
<span class="rpArrow"></span>
<span class="lbArrow"></span>
<span class="rbArrow"></span>
</div>
</body>
</html>
