   0%,to { transform: rotate(0) }
        20%,60% { transform: rotate(-25deg) }
        40%,80% { transform: rotate(10deg) }
      }
      @media (max-width: 720px) {
        .github-corner svg {
          height: 60px;
          width: 60px;
        }
      }
      @media (max-width: 500px) {
        .github-corner:hover .octo-arm { animation:none }
        .github-corner .octo-arm { animation: octocat-wave .56s ease-in-out }
      }
      button {
        padding: 4px 8px;
        cursor: pointer;
       