Place a 3x4 rectangle of oak logs. There should be a three-block gap between each log. Fill in the rectangle with oak wood planks. Place a ring of oak wood planks around the outside of the rectangle. Place a ring of oak wood slabs around the outside. Replace the corners with full blocks.
The bottom layer should be five blocks high, and the other five layers should be four high. Each layer should shrink inwards by one block on the long side, and one or two blocks on the short side.
