.sk-spinner-pulse {
  width: $spinkit-size;
  height: $spinkit-size;
  margin: $spinkit-spinner-margin;
  background-color: $spinkit-spinner-color;
  border-radius: 100%;
  animation: sk-pulseScaleOut 1.0s infinite ease-in-out;
}

@keyframes sk-pulseScaleOut {
  0% {
    transform: scale(0);
  } 100% {
    transform: scale(1.0);
    opacity: 0;
  }
}