I want you to build me a structure ...

I want you to build me a structure made up of 16 main flying islands arranged in a circle, each measuring 1000x1000 blocks. These 16 main flying islands have an average size ranging from 14x14 to 20x20. The 16 flying islands will be divided into two halves and arranged in two halves of the circle. 8 flying islands with a paradise theme (arranged close together). 8 flying islands with a hell theme (arranged close together). The paradise flying islands will have trees, small buildings, and beautiful decorations. The hell flying islands will have ruins, lava, hell trees, and skulls. In the center of the circle will be a separate flying island, measuring 50x50 blocks, containing an ancient arena.