Carpet

<div></div>
<div></div>
<div></div>
<div></div>
<style>
  body {
    display: grid;
    margin: 0;
    background: #0d1335;
    grid-template: 280px / 330px 0;
  }
  div {
    width: 70px;
    height: 20px;
    background: #dd6b4d;
    box-shadow:
      0 0 0 20px #0d1335,
      0 0 0 40px #dc6638,
      0 0 0 60px #0d1335,
      0 0 0 80px #dc6638,
      0 0 0 100px #0d1335,
      0 0 0 120px #dc6638;
  }
</style>