Brazil

<div>
  <p>
    <span></span>
  </p>
</div>
<style>
  body {
    background: #009b3a;
    display: grid;
    place-content: center;
  }
  div {
    width: 300px;
    height: 200px;
    background: #fedf00;
    clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);

    display: grid;
    place-content: center;
  }

  p {
    width: 120px;
    height: 120px;
    background: #002776;
    border-radius: 50%;
    overflow: hidden;
  }

  span {
    content: '';
    width: 190px;
    height: 190px;
    display: block;
    translate: -73px 30px;
    border-radius: 50%;
    border: 10px solid white;
  }
</style>