<div>mkimq.com</div>
body {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #2c3e50;
}

* {
  padding: 0;
  margin: 0;
}
div {
  color: #9b59b6;
  font-size: 5em;
  font-weight: bold;
  text-transform: uppercase;
  cursor: pointer;
}
div > span {
  position: relative;
  display: inline-block;
}
.changeColor {
  animation-name: changeColor;
  animation-duration: 1s;
  animation-direction: alternate;
  animation-iteration-count: 2;
  animation-timing-function: linear;
}
@keyframes changeColor {
  50% {
    color: #f1c40f;
    transform: scale(1.5);
  }
  to {
    color: #9b59b6;
    transform: scale(0.5);
  }
}
let div = document.querySelector("div");
[...div.textContent].reduce((pre, cur, index) => {
  pre == index && (div.innerHTML = "");
  let span = document.createElement("span");
  span.textContent = cur;
  div.appendChild(span);
  span.addEventListener("mouseover", function() {
    this.classList.add("changeColor");
  });
  span.addEventListener("animationend", function() {
    this.classList.remove("changeColor");
  });
}, 0);
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