* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #252839;
}

.loader div {
  height: 30px;
  width: 30px;
  border-radius: 50%;
  display: inline-block;
  margin: 8px;
  animation: animate 1.5s ease-in-out infinite;
  animation-delay: calc(var(--i) * 0.1s);
}

@keyframes animate {
  0%,
  100% {
    transform: scale(0.2);
    background-color: #bd0036;
  }

  40% {
    transform: scale(1);
    background-color: #f25330;
  }

  50% {
    transform: scale(1);
    background-color: #f2b900;
  }
}