<!DOCTYPE html>
<style>
.container {
  width: 200px;
  height: 200px;
  background-color: green;
  border: 20px solid black;
  clip-path: circle(120px at 120px 120px);
}
</style>
<body>
<div class="container"><div class="container"></div></div>
</body>
</html>
