@keyframes bounceDot {
  0% {
    transform: translateY(0);
  }

  20% {
    transform: translateY(-100%);
  }

  50% {
    transform: translateY(0);
  }
}

@keyframes fadein {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

$dotSize: 16px;

.wrap {
  width: 130px;
  height: 50px;
  position: relative;
  margin: 100px auto;
  animation: fadein 1s;
  padding-top: $dotSize;

  &::before {
    content: '';
    display: inline-block;
    width: $dotSize;
    height: $dotSize;
    background-color: #523ee8;
    border-radius: 50%;
    margin: 0 7px;
    animation: bounceDot 1.1s -0.6s linear infinite;
  }

  &::after {
    content: '';
    display: inline-block;
    width: $dotSize;
    height: $dotSize;
    background-color: #f73859;
    border-radius: 50%;
    margin: 0 7px;
    animation: bounceDot 1.1s 0s linear infinite;
  }
}

.inner {
  &::before {
    content: '';
    display: inline-block;
    width: $dotSize;
    height: $dotSize;
    background-color: #6d47d9;
    border-radius: 50%;
    margin: 0 7px;
    animation: bounceDot 1.1s -0.4s linear infinite;
  }

  &::after {
    content: '';
    display: inline-block;
    width: $dotSize;
    height: $dotSize;
    background-color: #f7bc28;
    border-radius: 50%;
    margin: 0 7px;
    animation: bounceDot 1.1s -0.2s linear infinite;
  }
}