Guernsey

<div></div>
<div></div>
<div></div>
<div></div>
<style>
  body {
    margin: 0;
    display: grid;
    place-items: center;
  }
  div {
    position: absolute;
  }

  div:nth-child(-n + 2) {
    width: 80px;
    height: 400px;
    background: #e8112d;
  }

  div:nth-child(n + 3) {
    width: 20px;
    height: 230px;
    background: #f9dd16;
  }

  div:nth-child(odd) {
    rotate: 90deg;
  }

  div:nth-child(3)::before,
  div:nth-child(4)::before,
  div:nth-child(4)::after,
  div:nth-child(3)::after {
    content: '';
    display: block;
    border: 20px solid transparent;

    border-top: 30px solid #f9dd16;
    translate: -10px 0;
  }
  div:nth-child(4)::after,
  div:nth-child(3)::after {
    rotate: 180deg;
    margin-top: 130px;
  }
</style>