1. Start with a cube:
2. Promote it to the Build default object (double click on the corresponding entry in the object list).
3. Switch to Build mode and start adding new cubes to create a 3-by-3 frame:
4. Select the structure and rotate it to become a platform and add 4 cubes as pillars:
5. Add a top layer of 3-by-3 cubes, apply Weld and Simplify operations:
Can you explain/experiment how to build the following shape?