So, do you want a completely empty world? do you want a place with no blocks? How you do it is:

Step 1: Click on "Create a New World"

Step 2:Make the world " SuperFlat" and click on Customize then on Presets.

Step 3: Delete whats in the box with the numbers

Step 4: Replace them with: 1x0

Step 5: Press "Use Preset" and it should say "Air -1"

Step 6: Click "Done"

Step 7: Turn on Creative Mode

Step 8: Name ur world

Step 9: Create new world

Step 10: When u spawn, quickly fly so u don't die in void.

There u have it! also, this next step requires Single Player Commands: (NEW WAY WITHOUT SMP BELOW!)

Step 11: If u want 3 blocks, do //cyl stone 1

Step 11(No SMP) /setblock 1 ~ ~ ~

Thanks, if u like,

Diamond, Favorite, and Subscribe!

(Also forgot 2 mention floating villages will spawn,LOL) Found a way to fix this, turn off "Generate Structures"