Untitled

<html>
<head>
<style>
#sarga{
background-color: yellow;
width: 200px;
height: 200px;
border: 5px #ff0000 solid;
margin-left: 800px;
margin-top: 130px;
position: absolute;
}
#zod{
background-color: green;
width: 200px;
height: 200px;
border: 5px  #964B00 solid;
left: 100px;
top: 130px;
position: absolute;
}
#kek{
background-color: blue;
width: 100px;
height: 100px;
border: 5px brown solid;
left: -30px;
top: -30px;
position: absolute;
z-index: -1;
}
</style>
</head>
<body>
<div id="sarga">
<div id="kek">
</div>
</div>
<div id="zod">
</div>
</body>
</html>