<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<style type="text/css">
/*
relative
1. 기존 요소를 참고해서 알아서 배치
2. 기존 요소를 기준으로 top, bottom, left, right 값을 사용
*/
*{
padding: 0;
margin: 0;
}
div{
position: relative;
width: 100px;
height: 100px;
border: 1px solid black;
top: 100px;
left:100px;
}
#red{
background-color: red;
}
#orange{
background-color: orange;
}
#yellow{
background-color: yellow;
}
#green{
background-color: green;
}
</style>
</head>
<body>
<div id="red">
<div id="orange">
<div id="yellow">
<div id="green"></div>
</div>
</div>
</div>
</body>
</html>
