Document
.div {
width: 400px;
height: 400px;
border: 1px solid rgb(235, 175, 185);
border-radius: 50%;
background: linear-gradient(to left, white 50%, black 50%);
}
.div1 {
width: 200px;
height: 200px;
border: 1px solid;
border-radius: 50%;
background: radial-gradient(white 20%, black 20%);
margin-left: 100px;