End City/Structure/Small Tower

Tower
Towers are hollow, consisting only of a single Purpur Slab staircase.

Layer 18

 * If the block is Green Wool the stair next to it is flipped upside-down and if it's Red Wool, then it's not.
 * DON'T add any wool to the structure.

Layer 22

 * If the block is Green Wool the stair next to it is flipped upside-down and if it's Red Wool, then it's not.
 * DON'T add any wool to the structure.