JSFiddle - React, Tailwind, and code Playground

HTML

<div class="loader"></div>

SCSS

body {
  background: #222;
}

.loader {
  position: relative;
  width: 200px;
  height: 200px;
  background: #fff;
  border-radius: 50%;
  
  &:before, &:after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    border-radius: 50%;
    transform: translate(-50%, -50%);
  }
  
  &:before {
    width: 40px;
    height: 40px;
    background: #fff;
    z-index: 3;
  }
  
  &:after {
    width: 60px;
    height: 60px;
    background: conic-gradient(#417AFE 0%, #EE82EE00 100%);
    animation: loader 3s infinite linear;
    z-index: 2;
  }
}

@keyframes loader {
  100% {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}