How to make my map of the empty island in the world?

Open a super flat map in the high version, and there is no super square block in the low version. Put a bedrock on the ultra-flat and then open the map in the low version (for example, you can set a unique 1.9 square on the ultra-flat with 1.9 version, then put a square on the low version, you can put bedrock or something, and then open it with 1.8 version). Then enter the map and knock out a grain of sand, and the other grain of sand will fall into the void under the action of gravity (put a square that is not affected by gravity before knocking out the sand, and your computer configuration should be high), and download an empty island map on the Internet to improve it (the special plan for guarding the party).