console
<!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>
.box {
position: relative;
height: 300px;
width: 300px;
background-color: blue;
}
.box1 {
position: absolute;
width: 100px;
height: 100px;
top: 0px;
left: 0px;
background-color: red;
}
.box2 {
position: absolute;
width: 100px;
height: 100px;
top: 0px;
right: 0px;
background-color: yellow;
}
.box3 {
position: absolute;
width: 100px;
height: 100px;
left: 0px;
bottom: 0px;
background-color: chartreuse;
}
.box4 {
position: absolute;
width: 100px;
height: 100px;
right: 0px;
bottom: 0px;
background-color: salmon;
}
</style>
</head>
<body>
<div class="box">
<div class="box1"></div>
<div class="box2"></div>
<div class="box3"></div>
<div class="box4"></div>
</div>
</body>
</html>