Edit in JSFiddle

require([
    'dojo/dom',
    'dojo/fx',
    'dojo/domReady!'
], function (dom, fx) {
    // The piece we had before...
    var greeting = dom.byId('greeting');
    greeting.innerHTML += ' from Dojo!';

    // ...but now, with an animation!
    fx.slideTo({
        node: greeting,
        top: 100,
        left: 200
    }).play();
});

<h1 id="greeting">Hello</h1>

h1 {
    font-family: Helvetica, sans-serif;
}