How do I make curve patterns?

As title, how do I make curve patterns?

For example,

http://img694.imageshack.us/img694/9973/ji0o.png

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Have been box modelling but to no success and I think there should be an easier way to make the curves. Hopefully someone can help me.

Thanks!

You could use curves
http://wiki.blender.org/index.php/Doc:2.6/Manual/Modeling/Curves
http://wiki.blender.org/index.php/Doc:2.6/Tutorials/Modeling/Curves/Bézier


You can convert curve objects to mesh objects with Alt+C