MC 1.21.1 vanilla blocks only. Poke...

MC 1.21.1 vanilla blocks only. Pokemon battle arena on a floating island in a forest. Origin = center of arena floor, coords relative (~). Island: disc r40, edge jittered +/-3, not a perfect circle. Underside tapers to a ragged point 28 below, stone/deepslate, hanging roots, one solid mass. Grass over 3 dirt layers. From center: r0-12 field, dead flat and totally clear, nothing overhead, Poke Ball floor (white north half, red south, black band, gray center). r13 mossy cobble wall. r15-21 four tiers of dark oak stair seating, aisles at the 4 cardinals. r22-34 forest: oak/birch, ferns, moss. r38 fence railing, gapped only for a south arch entrance. Light 8+ everywhere walkable. No redstone. No /fill over 32768 blocks. Return numbered build phases with exact /fill commands.