body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: #292C35;
}

:root {
  --loader-size: 100px;
}

.loader {
  width: var(--loader-size);
  height:var(--loader-size);
  border-radius: 50%;
  display: inline-block;
  position: relative;
  border: 3px solid;
  border-color: #ade8f4 #ade8f4 transparent #ade8f4;
  box-sizing: border-box;
  animation: rotation 1.5s linear infinite;
}
.loader::after,
.loader::before {
  content: '';  
  box-sizing: border-box;
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  margin: auto;
  border: 3px solid;
  border-color: transparent transparent #FF3D00 #FF3D00;
  width: calc(var(--loader-size) - 15px);
  height: calc(var(--loader-size) - 15px);
  border-radius: 50%;
  box-sizing: border-box;
  animation: rotationBack 0.7s linear infinite;
  transform-origin: center center;
}
.loader::before {
  width: calc(var(--loader-size) - 30px);
  height: calc(var(--loader-size) - 30px);
  border-color: #FFF #FFF transparent transparent;
  animation: rotation 2s linear infinite;
}
    
@keyframes rotation {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
} 
@keyframes rotationBack {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(-360deg);
  }
}