.showpopup {
    opacity: 0;
    animation: ani 5.5s forwards;
    position: fixed;
    right: 0;
    bottom: 0;
    padding: 15px 40px;
    margin: 20px 40px;
    background: green;
    font-weight: bold;
    color: #fff;
    font-size: 18px;
}
  
@keyframes ani {
    0% {
      opacity: 1;
    }
    99% {
      opacity: 0;
    }
    100% {
      opacity: 0;
      height: 0;
      width: 0;
    }
  }