Maze Maker Command Block 1.9.4
Credits: Unlikely Waffle
Maze Maker in Vanilla Minecraft with two command blocks. Maze Maker Command Block lets you place any of 12 different maze modules anywhere you wish in order to create the maze of your dreams. You can use just one module or place hundreds of them down to create the most diabolical maze you can think of. You are even able to change the block that each section is made of.
How to install:
To add any one-command creation to your world, first give yourself a command block with/give @p minecraft:command_block.
You have to place 2 command blocks on top of each other. Paste the 1st command in the bottom one and the 2nd command in the upper one.
Once you pasted all the commands, you have to activate with a redstone block just the command block at the bottom.