webgl backgrounds

I hope this is the right forum to ask, I looked around and couldn’t find anything too similar to what I’m asking.

I’d like to use have a WebGL background in my wordpress home page, using an html file created from Blend4web…

http://theinterestingtimesgang.net/TITG.html

It works fine on its own page, however I’d like to place it underneath my menu and content boxes. The theme already allows for background video and images, and I’d like to keep that functionality so I’m hoping there’s a way to use a specific html page back there instead. Maybe using an iframe? Or is there a better way to plug in this webgl content?

I’ve been wanting to do something like this for years, but html and php still make very little sense! Any help is greatly appreciated.