.dots {
  width: 3.5em;
  display: flex;
  flex-flow: row nowrap;
  align-items: center;
  justify-content: space-between;
  margin:100px auto;
}

.dots div {
  width: 0.8em;
  height: 0.8em;
  border-radius: 50%;
  background-color: #fc2f70;
  animation: fade 0.8s ease-in-out alternate infinite;
}

.dots div:nth-of-type(1) {
  animation-delay: -0.4s;
}

.dots div:nth-of-type(2) {
  animation-delay: -0.2s;
}

@keyframes fade {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}