.container{
  display: flex;
  flex-direction: column;
  border: 1px solid red;
  max-height: 2em;
  overflow-y: scroll;
}

.moving {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  animation: vert 3s infinite alternate;
  position: relative;
}

.moving h2{
  font-size: 2em;
  margin: 0px;
  padding: 0px;
}

@keyframes vert{
   from {top: 0em;}
   2% {top: 0em;}
   25% {top: -2em}
   50% {top: -4em}
   75% {top: -6em}
   99% {top: -8em}
  to {top: -8em;}
}