<div class="box">
<div class="item"></div>
</div>
.box {
width:100%;
max-width:500px;
height:500px;
border:5px solid #f00;
position:relative;
}
.item {
width:50px;
height:50px;
background-color: #f00;
border-radius:100%;
position: static;
right:0;
bottom:100px;
}
This Pen doesn't use any external CSS resources.
This Pen doesn't use any external JavaScript resources.