.bangladesh {
  background-color: green;
  width: 600px;
  height: 400px;
  position: relative;
}
.bangladesh::after {
  content: "";
  background-color: red;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  position: absolute;
  left: 185px;
  top: 100px;
}