So yeah, I don't really get what you're trying to say. I'm assuming that's not your site but you want to produce an effect similar to it. I'm not going to download your HTML file, I'd prefer you'd post your code here. But here's how I'd achieve that effect.
Do note, that this is a very minified version of what that site has. If you want me to work with your code, then post it on here in code tags. Let me know exactly what you want, and I'll try to see what I can get.