<script src="https://unpkg.com/typed.js@2.0.132/dist/typed.umd.js"></script>
<h2 id="greeting"></h1>
let typed = new Typed('#greeting', {
strings: ['hello', 'world'],
typeSpeed: 100,
backSpeed: 100,
backDelay: 1000,
loop: true,
loopCount: 3
});