1.loader {
2  display: flex;
3  align-items: center;
4}
5
6.bar {
7  display: inline-block;
8  width: 3px;
9  height: 20px;
10  background-color: rgba(255, 255, 255, .5);
11  border-radius: 10px;
12  animation: scale-up4 1s linear infinite;
13}
14
15.bar:nth-child(2) {
16  height: 35px;
17  margin: 0 5px;
18  animation-delay: .25s;
19}
20
21.bar:nth-child(3) {
22  animation-delay: .5s;
23}
24
25@keyframes scale-up4 {
26  20% {
27    background-color: #ffff;
28    transform: scaleY(1.5);
29  }
30
31  40% {
32    transform: scaleY(1);
33  }
34}