#contentLoader
{
   width: 100%;
  height: 100%; 
  background-color: rgba(255, 255, 255, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
}

#loader {
  width: 30px;
  height: 25px;
  margin: auto;
  display: flex;
  flex-flow: row no-wrap;
  justify-content: center;
  align-items: center;
}
#loader.loaded .bar {
  width: 5px;
  height: 5px;
  margin-right: 1px;
  border-radius: 5px;
  flex: 1 5px;
}
#loader.loaded .bar:last-child {
  margin: 0;
}
#loader.loaded .bar:nth-child(1) {
  animation: load 0.3s ease-in-out 0.1s infinite alternate;
}
#loader.loaded .bar:nth-child(2) {
  animation: load 0.3s ease-in-out 0.2s infinite alternate;
}
#loader.loaded .bar:nth-child(3) {
  animation: load 0.3s ease-in-out 0.3s infinite alternate;
}
#loader.loaded .bar:nth-child(4) {
  animation: load 0.3s ease-in-out 0.4s infinite alternate;
}
#loader.loaded .bar:nth-child(5) {
  animation: load 0.3s ease-in-out 0.5s infinite alternate;
}

@keyframes load {
  100% {
    height: 25px;
  }
}