Build only the foundation of a larg...

Build only the foundation of a large circular ancient combat arena. The main fighting floor should be 72 blocks in diameter, with a 90-block-wide outer ruin ring. Create a large entrance on the south side and smaller closed archways on the north, east, and west sides. Use stone bricks, cracked stone bricks, mossy stone bricks, cobblestone, andesite, gravel, and small amounts of coarse dirt. Keep the combat floor mostly flat, with only minor cracks and elevation changes of one block. Add a solid foundation underneath the entire structure. Do not build towers, statues, seating, vegetation, roofs, or detailed decorations. make it flat