1.loader {
2  height: 40px;
3  width: 40px;
4  border-radius: 50%;
5  box-shadow: inset 0 0 0 #0a7cbe;
6  animation: load 2s linear infinite alternate;
7}
8
9@keyframes load {
10  0% {
11    box-shadow: inset -20px 40px 0 #0a7cbe;
12  }
13
14  100% {
15    box-shadow: inset 20px -40px 0 #0a7cbe;
16  }
17}