How to build animation using javascript?

I have 3 yellow bars. The bar should come from out of my boundary box to inside. While the yellow box enter in to site, it should delay each other 3sec. And I like to build this animatio开发者_StackOverflow社区n using Webkit-transition. I know I can use javascript to implement it.

What is best way to do this?

Something along these lines?

http://jsfiddle.net/N82Kc/

It doesn't use WebKit transform so it works in all browsers. Depends what your users need.