#box1 {
background-color: #ac77ec;
margin: 10px;
padding: 10px;
height: 200px;
width: 200px;
position: relative;
z-index: 2;
}

#box2 {
background-color: #ff6666;
margin-top: -175px;
margin-left: 180px;
padding: 10px;
height: 200px;
width: 200px;
position: relative;
z-index: 1;
}