button {
  font-size: 20px;
  background-color: white;
  color: black;
  width: 45px;
  height: 45px;
  opacity: 0.75;
  border: 1px solid #e7eae8;
  border-radius: 8px;
  cursor: pointer;
  animation: bounce_513 1s infinite;
}

@keyframes bounce_513 {
  0%,
    100% {
    transform: translateY(-25%);
    animation-timing-function: cubic-bezier(0.8, 0, 1, 1);
  }

  50% {
    transform: translateY(0);
    animation-timing-function: cubic-bezier(0, 0, 0.2, 1);
  }
}