't easy, maybe start with a circle. */
.github {
  width: 200px;
  height: 200px;
  background: #15141a;
  border-radius: 50%;
  margin: auto;
  display: block;
  position: relative;
}

/* Ha, because I fiddled with the styles, it might look a bit long~ */
.github::before,
.github::after,
.github > i::before,
.github > i::after,
.github > i > i::before,
.github > i > i::after {
  content: '';
  display: block;
  position: absolute;
  background-color: #fff;
}

/* he face seems to go like this. */
.github::b