SOURCE

<section>
  <div>
  </div>
  <div>
  </div>
</section>

section {
  display: flex;
  flex-wrap: wrap;
}

div {
  margin: 100px auto;
  width: 5px;
  height: 5px;
  background: white;
  text-align: center;
  line-height: 100px;
  border-radius: 50%;
  box-shadow: 0 0 0 5px black, 0 0 0 10px white, 0 0 0 15px black, 0 0 0 20px white, 0 0 0 25px black, 0 0 0 30px white, 0 0 0 35px black, 0 0 0 40px white, 0 0 0 45px black, 0 0 0 50px white, 0 0 0 55px black, 0 0 0 60px white, 0 0 0 65px black;
}