Code1

public static void execute(LevelAccessor world, double x, double y, double z) {
		int Radius = 0;
		Radius = 20;
		int centre = 0;
		int x1,y1,z1;

		for(x1 = centre - Radius;x1 < centre +Radius;x1++){
			for(y1 = centre-Radius;y1<centre+Radius;y1++) {
				for(z1 = centre-Radius;z1<centre+Radius;z1++){
					float squareDistance = ((x1 -centre) * (x1 -centre)) + ((y1-centre) * (y1-centre)) + ((z1-centre) * (z1-centre));
					if (squareDistance <= (Radius * Radius))
					world.setBlock(new BlockPos(x+x1, y+y1, z+z1), Blocks.AIR.defaultBlockState(), 3);


				}
			}
		}
	}