To save you trying to follow my tutorial and then changing blocks to make different colours i give the Assorted Wood Towers Pack!

This comes with the following wood variant towers:

-Oak Wood
-Spruce Wood
-Birch Wood
-Jungle Wood
-Acacia Wood
-Dark Oak Wood

Just download the .zip file, put it into your Minecraft saves file, unzip it and log onto the world!

Wanna add the towers to your own world?

Then download MCEdit and simple copy and drop them where you want!

I hope this was useful to you all!