Missing Piece

<div></div>
<div></div>
<div></div>
<style>
  body {
    background: #d669ec;
    display: grid;
    place-content: center;
    grid-template-columns: auto auto;
    gap: 20px;
  }
  div {
    width: 100px;
    height: 100px;
    background: linear-gradient(
      135deg,
      #d669ec 33px,
      #fdfbf8 33px 108.5px,
      #d669ec 0
    );
    rotate: 90deg;
  }

  div:nth-child(2),
  div:nth-child(3) {
    rotate: 180deg;
  }
</style>