spinner.css

/* spinner: https://github.com/loadingio/css-spinner */
.lds-spinner {
  -moz-user-select: none;
  user-select: none;
  pointer-events: none;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  width: 200px; /* don't change! use "transform: scale(.75)" */
  height: 200px; /* don't change! use "transform: scale(.75)" */
  margin: auto;
  animation: lds-spinner 1s reverse;
  animation-fill-mode: both;
}

@keyframes lds-spinner {
  0% {
    opacity: 1;
  }

  100% {
    opacity: 0;
  }
}

.lds-spinner div {
  left: 94px;
  top: 23px;
  position: absolute;
  animation: lds-spinner linear 1s infinite;
  animation-direction: reverse;
  background: currentColor;
  width: 12px;
  height: 34px;
  border-radius: 20%;
  transform-origin: 6px 77px;
}

.lds-spinner div:nth-child(1) {
  transform: rotate(0deg);
  animation-delay: -0.916666666666667s;
}

.lds-spinner div:nth-child(2) {
  transform: rotate(30deg);
  animation-delay: -0.833333333333333s;
}

.lds-spinner div:nth-child(3) {
  transform: rotate(60deg);
  animation-delay: -0.75s;
}

.lds-spinner div:nth-child(4) {
  transform: rotate(90deg);
  animation-delay: -0.666666666666667s;
}

.lds-spinner div:nth-child(5) {
  transform: rotate(120deg);
  animation-delay: -0.583333333333333s;
}

.lds-spinner div:nth-child(6) {
  transform: rotate(150deg);
  animation-delay: -0.5s;
}

.lds-spinner div:nth-child(7) {
  transform: rotate(180deg);
  animation-delay: -0.416666666666667s;
}

.lds-spinner div:nth-child(8) {
  transform: rotate(210deg);
  animation-delay: -0.333333333333333s;
}

.lds-spinner div:nth-child(9) {
  transform: rotate(240deg);
  animation-delay: -0.25s;
}

.lds-spinner div:nth-child(10) {
  transform: rotate(270deg);
  animation-delay: -0.166666666666667s;
}

.lds-spinner div:nth-child(11) {
  transform: rotate(300deg);
  animation-delay: -0.083333333333333s;
}

.lds-spinner div:nth-child(12) {
  transform: rotate(330deg);
  animation-delay: 0s;
}