Piano

<div></div>
<style>
  body {
    background: #998235;
    display: grid;
    place-content: center;
  }
  div {
    width: 180px;
    height: 100px;
    background: #191919;
    border-radius: 10px;
    position: relative;
  }

  div::after,
  div::before {
    content: '';
    position: absolute;
  }

  div::after {
    width: 20px;
    height: 70px;
    background: #ffffff;
    color: #ffffff;

    left: 5px;
    bottom: 5px;
    border-radius: 5px;
    box-shadow:
      25px 0,
      50px 0,
      75px 0,
      100px 0,
      125px 0,
      150px 0;
  }
  div::before {
    width: 15px;
    height: 35px;
    background: #191919;
    color: #191919;
    z-index: 1;
    left: 20px;
    top: 25px;
    box-shadow:
      25px 0,
      75px 0,
      100px 0,
      125px 0;
  }
</style>