1.loader {
2  width: 84px;
3  height: 84px;
4  position: relative;
5}
6
7.loader:before , .loader:after {
8  content: "";
9  position: absolute;
10  left: 50%;
11  bottom: 0;
12  width: 64px;
13  height: 64px;
14  border-radius: 50%;
15  background: #FFF;
16  transform: translate(-50% , -100%)  scale(0);
17  animation: push_401 2s infinite linear;
18}
19
20.loader:after {
21  animation-delay: 1s;
22}
23
24@keyframes push_401 {
25  0% , 50% {
26    transform: translate(-50% , 0%)  scale(1)
27  }
28
29  100% {
30    transform: translate(-50%, -100%) scale(0)
31  }
32}