Edit in JSFiddle

var two = new Two({
          type:Two.Types.webgl,
        fullscreen: true,
        autostart: true
      }).appendTo(document.body);

      var styles = {
            family: 'proxima-nova, sans-serif',
            size: 50,
            leading: 50,
            weight: 900
          };
          
    
        var rect = two.makeRectangle(two.width / 2, two.height / 2, 50 ,50);
        var text = two.makeText("Hello", two.width / 2, two.height / 2,styles);
      two.bind('update', function() {
          rect+= 0.001;
       	  if(text.scale<10)text.scale += 0.01;
      });

<script src="https://cdnjs.cloudflare.com/ajax/libs/two.js/0.6.0/two.min.js"></script>