Display the free loading SPINNER (found here : http://fgnass.github.io/spin.js/ ) as a loading bar for HTML5 games.
Simply add the extension, select the loading bar function in the HTML5 tab, then edit the supplied .JS file, adding the USAGE created from the site above to make your own custom spinner.
Be sure to take change the TOP and LEFT values of the opts to these:
Also make sure to set the COLOUR to non-black
End User Licence Agreement (EULA).