Changing wool color with redstone

Hello, I was trying to make a plugin where you can put a cloth block on the redstone, and then when it receives power it turns white, and when its off it turns black.
But how can I set the wool color?
I heared something about setData, but it didn't really seemed to work when I tested it...
And is it correct that I used the RedstoneChange listener and BlockRedstoneChange?

I hope that someone can help me a bit with understanding the redstone events and setting the wool colors, because there is no Material called 'BLUEWOOL' etc. in Bukkit.

Cheers!

 

This section will be more useful to you:
http://forums.bukkit.org/forums/plugin-development.5/

 

Check out a mod called ControllerBlock, I believe that does a very similar thing and they are working on/have support for block colours

In case you hadn't worked it out, wool colours (and tree trunk designs) have a different ID system - they all share the same ID number and have a different number somewhere that specifies the actual texture.