1button {
2  font-size: 20px;
3  background-color: white;
4  color: black;
5  width: 45px;
6  height: 45px;
7  opacity: 0.75;
8  border: 1px solid #e7eae8;
9  border-radius: 8px;
10  cursor: pointer;
11  animation: bounce_513 1s infinite;
12}
13
14@keyframes bounce_513 {
15  0%,
16    100% {
17    transform: translateY(-25%);
18    animation-timing-function: cubic-bezier(0.8, 0, 1, 1);
19  }
20
21  50% {
22    transform: translateY(0);
23    animation-timing-function: cubic-bezier(0, 0, 0.2, 1);
24  }
25}
26