@keyframes buttonBig {
  0% {
    opacity: 1;
    top: -1px;
    left: -1px;
    bottom: -1px;
    right: -1px;
    border-width: 1px;
  }

  100% {
    opacity: 0;
    top: -4px;
    left: -4px;
    bottom: -4px;
    right: -4px;
    border-width: 4px;
  }
}