h2 {
  font-family: "Consolas", monospace;
  font-size: 1.5em;
  animation: color-change .9s infinite;
}

@keyframes color-change {
  0% { color: yellow; }
  16.66% { color: Blue; }
  33.32% { color: orange; }
  49.98% { color: red; }
  66.64% { color: purple; }
  100% { color: limegreen; }