.loader-container {
}

.loader {
  display: inline-block;
  position: relative;
  width: 48px;
  height: 48px;
  
  margin:auto;
  left:0;
  right:0;
  top:0;
  bottom:0;
  position:fixed;
}
  
.loader > .ball {
  position: absolute;
  width: 10px;
  height: 10px;
  background-color: #ffffff;
  border-radius: 50%;
  animation: pop 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}

.loader > .ball:nth-child(1) {
  top: 10px;
  left: 10px;
  animation-delay: -0.3s;
}
  
.loader > .ball:nth-child(2) {
  top: 10px;
  right: 10px;
  animation-delay: -0.15s;
}
  
.loader > .ball:nth-child(3) {
  bottom: 10px;
  right: 10px;
  animation-delay: 0s;
}

.loader > .ball:nth-child(4) {
  bottom: 10px;
  left: 10px;
  animation-delay: 0.25s;
}
  
@keyframes pop {
  0%,
  100% {
    transform: scale(0);
  }
  50% {
    transform: scale(1);
  }
}