html, body {
  height: 100%;
}

body {
  display: grid;
  place-items: center;
  margin: 0;
  background: #FBFBFD;
}

span {
  --size: 200px;
  width: var(--size);
  height: var(--size);
  background: #616AFF;
  clip-path: polygon(
    50% 20%,
    80% 20%,
    80% 50%,
    80% 80%,
    65% 80%,
    50% 80%,
    35% 80%,
    20% 80%,
    20% 50%,
    20% 20%
  );
}