1.loader {
2  width: 8px;
3  height: 40px;
4  border-radius: 4px;
5  display: block;
6  background-color: currentColor;
7  margin: 20px auto;
8  position: relative;
9  color: #f2f2f2;
10  animation: animloader 0.3s 0.3s linear infinite alternate;
11}
12
13.loader::after,
14.loader::before {
15  content: '';
16  width: 8px;
17  height: 40px;
18  border-radius: 4px;
19  background: currentColor;
20  position: absolute;
21  top: 50%;
22  transform: translateY(-50%);
23  left: 20px;
24  animation: animloader 0.3s 0.45s linear infinite alternate;
25}
26
27.loader::before {
28  left: -20px;
29  animation-delay: 0s;
30}
31
32@keyframes animloader {
33  0% {
34    height: 48px;
35  }
36
37  100% {
38    height: 4px;
39  }
40}