Interleaved

<div></div>
<div></div>
<style>
  body {
    background: #1a4341;
  }
  div {
    width: 50px;
    height: 200px;
    background: #dd6b4d;
    position: absolute;
  }

  div:nth-child(1) {
    top: 0;
    left: 100px;
    border-radius: 0 0 50px 50px;
    background: #998235;
    box-shadow: 150px 0 #998235;
  }
  div:nth-child(2) {
    bottom: 0;
    left: 25px;
    border-radius: 50px 50px 0 0;
    background: #f3ac3c;
    box-shadow:
      150px 0 #f3ac3c,
      300px 0 #f3ac3c;
  }
</style>