Colony Survival Guide

So what you have to do to start the building is make a 4X4 square like so.
Then you build up from each block however many blocks you'd like, i did 100 from the ground.
I used the flying cheat to do this, to enable the cheat you first type /cheats on then you type /setflight true.
After building the basis you build a spiral staircase to go up your tower.
What you do next is build whatever you want to on top to house your colonists and the beds and the banner. I just did a platform for simplicity.
Then take a section of wall out and put a platform for berry farms or whatever.