<button class="target">🍌</button>

.target {
  transform: rotate(30deg) scale(0.9);
  animation: animate 1s infinite;
}

@keyframes animate{
  to{
    transform: scale(1.1);
  }
}

button{
  font-size:5rem;
  background:#e0218a;
}

html{
  height:100%;
  width:100%;
  display:grid;
  place-items:center;
}