How to make animated intro?

There are a few websites that I stumble upon now and then that have animated intros like the one here: www.monotwo.com

How do I do that in WordPress?

And how would I integrate this into a customs theme?

Thanks.

You can try this.

How To Create A Custom Preloading Screen

or you can research follow these keywords to know more detail.

• how to use CSS3 transitions
• how to animate out a full-screen preloader
• how to combine CSS3 with JavaScript for this technique