.loader {
  width: 64px;
  height: 64px;
  background: #ff6b6b;
  display: block;
  margin: 20px auto;
  position: relative;
  box-sizing: border-box;
  animation: rotation 1s linear infinite;
}

.loader::before {
  content: '';
  box-sizing: border-box;
  left: 0;
  top: 0;
  transform: rotate(45deg);
  position: absolute;
  width: 64px;
  height: 64px;
  background: #ff3d3d;
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.15);
}

.loader::after {
  content: '';
  box-sizing: border-box;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  position: absolute;
  left: 50%;
  top: 50%;
  background: rgb(255, 107, 107);
  transform: translate(-50%, -50%);
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.15);
}

@keyframes rotation {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}