make top of div circle css code example
Example 1: circle div
border-radius: 50%;
width: 200px;
height: 200px;
/* width and height can be anything, as long as they're equal */
Example 2: how to create a circle with css
<div id="circle">
</div>
#circle {
width: 100px;
height: 100px;
background: red;
border-radius: 50%
}