Build a compact 40x40x15 ancient ar...

Build a compact 40x40x15 ancient arena. Style: Stone Bricks, Mossy Stone, Polished Diorite, Iron Bars. Structure: - Base: 40x40 flat stone platform floating in void. - Center: Circular battle ring (radius 15) made of Polished Andesite. - Edges: 4 ruined stone pillars (5 blocks high) at corners. - Lighting: Sea Lanterns embedded in floor patterns. - NO roof. NO walls higher than 2 blocks. - Centerpoint: Small pedestal with a Beacon. Strictly ensure total size is under 40x40x20 blocks.