.loader {
  width: 44.8px;
  height: 44.8px;
  color: #3bb5fa;
  position: relative;
  background: radial-gradient(11.2px,currentColor 94%,#0000);
}

.loader:before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: radial-gradient(10.08px at bottom right,#0000 94%,currentColor) top    left,
          radial-gradient(10.08px at bottom left ,#0000 94%,currentColor) top    right,
          radial-gradient(10.08px at top    right,#0000 94%,currentColor) bottom left,
          radial-gradient(10.08px at top    left ,#0000 94%,currentColor) bottom right;
  background-size: 22.4px 22.4px;
  background-repeat: no-repeat;
  animation: loader 1.5s infinite cubic-bezier(0.3,1,0,1);
}

@keyframes loader {
  33% {
    inset: -11.2px;
    transform: rotate(0deg);
  }

  66% {
    inset: -11.2px;
    transform: rotate(90deg);
  }

  100% {
    inset: 0;
    transform: rotate(90deg);
  }
}