.topbar{
    padding-top: 4px;
    padding-bottom: 4px;
    text-align:center;
    color: #4E47DE;
    animation: animate 1.5s linear infinite;
}

@keyframes animate{
   0%{
     opacity: 0.4;
   }
   50%{
     opacity: 1;
   }
   100%{
     opacity: 0.4;
   }
 }