throbber animation

by Alexandru Gatea

HTML

<div id="throbber"></div>
<div class="throbber"></div>

SCSS

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

body {
  background-image: url('https://www.seedinvest.com/wp-content/uploads/2014/12/1600x1200-new-york-city-skyline-wallpaper-black-and-white.jpg');
  background-color: #212121;
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center center;
  height: 100vh;
  background-blend-mode: multiply;
}

#throbber,
.throbber {
  display: block;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  position: fixed;
  top: 50%;
  left: 50%;
  margin-top: -75px;
  margin-left: -75px;
  background: transparent;
  border: 10px solid transparent;
  background-blend-mode: multiply;
  &:before,
  &:after {
    position: absolute;
    content: "";
    width: 70%;
    height: 70%;
    border-radius: 50%;
    border: 10px solid;
    left: 50%;
   
  }
}

#throbber {
  animation: rotate 6s linear infinite;
  &:before {
    top: 0;
    transform: translate(-50%, -50%);
    background: rgba(198, 40, 40, 0.3);
    border-color: rgba(198, 40, 40, 0.5);
    animation: toBottom 3s ease-in-out infinite;
  }
  &:after {
    bottom: 0;
    transform: translate(-50%, 50%);
    background: rgba(255, 143, 0, 0.3);
    border-color: rgba(255, 143, 0, 0.5);
    animation: toTop 3s ease-in-out infinite;
  }
}

.throbber {
  animation: rotate 6s linear infinite;
  &:before,
  &:after {
    top: 50%;
    transform: translateY(-50%);
  }
  &:before {
    left: 0;
    top: 50%;
    transform: translate(-50%, -50%);
    background: rgba(2, 119, 189, 0.3);
    border-color: rgba(2, 119, 189, 0.5);
    animation: toRight 3s ease-in-out infinite;
  }
  &:after {
    right: 0;
    left: auto;
    background: rgba(85, 139, 47, 0.3);
    border-color: rgba(85, 139, 47, 0.5);
    transform: translate(50%, -50%);
    animation: toLeft 3s ease-in-out infinite;
  }
}

@keyframes toBottom {
  0% {
    top: 0;
  }
  50% {
    top: 100%
  }
}

@keyframes toTop {
  0% {
    bottom: 0;
  }
  50% {
    bottom: 100%;
 ...