Build the Central Spawn Mosaic at c...

Build the Central Spawn Mosaic at coordinates (0, 100, 0) on the main island. This is the first thing every player sees on join. It must be extraordinary. The mosaic is a circular mandala floor pattern, 62 blocks in total diameter. Every ring described below is concentric and perfectly centered on (0, 100, 0). ═══════════════════════════════════════════════════════════════ RING 1 — OUTERMOST BOUNDARY (radius 29-31 blocks from center) ═══════════════════════════════════════════════════════════════ Place a 1-block-tall raised lip of polished_deepslate_slab on the very outer edge of the mosaic circle (radius 31). This slab sits proud of the main island surface by half a block, creating a curb that defines the mosaic boundary. Just inside the raised lip (radius 29-30): fill with polished_d