Create a 150x150 BoxPVP arena desig...

Create a 150x150 BoxPVP arena designed as a dark, high-security Prison. Use thematic blocks like stone bricks, deepslate, and iron bars. The layout is a massive enclosed room. Inside the main prison yard, distribute several mining zones. On the main outer boundary walls, create exactly one deep hole/cavity per wall (4 holes in total). Inside each of these four wall cavities, design a specialized mining area. Finally, construct a small, enclosed, and secure lobby embedded in the central wall area. This is the most critical part: this central lobby will serve as the initial world spawn point for all players to safely spawn before entering the main prison arena.