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@keyframes my-animation {        
  from {
    opacity : 0;
    left : -500px;
  }
  to {
    opacity : 1;
    left : 0;
  }      
}

.run-animation {
  position: relative;
  animation: my-animation 2s ease;
}

#logo {
  text-align: center;
  font-family : Palatino Linotype, Book Antiqua, Palatino, serif;
}

<h1 id="logo" class="run-animation">
  Fancy Text (click to restart)
</h1>

"use strict";

var element = document.getElementById("logo");

element.addEventListener("click", function(e){
  e.preventDefault;

  element.classList.remove("run-animation");
  void element.offsetWidth;
  
  element.classList.add("run-animation");
}, false);