Build a grand, polished indoor casi...

Build a grand, polished indoor casino with one huge circular central hall and exactly four huge, straight hallways extending north, south, east, and west, aligned to the Minecraft world grid. Each hallway must connect directly to the central hall through a full-width, unobstructed opening; do not block these openings with walls, doors, pillars, or other blocks. Add one entrance through the outer wall of the central hall. Enclose the entire casino with a complete roof and high ceiling, including the central hall and all four hallways. Hang a large chandelier above the open center. Use one solid black-concrete floor throughout the central hall and hallways, with no patterns, borders, stripes, spots, gradients, or color changes. Use deep red for large wall sections, sandstone for pillars, and