Effortless Building Mod will significantly speed up the construction process, allowing you to copy in real time the structures you have built a number of times in the direction you need. You can also use quick block replacement.
How to install:Download and install Minecraft Forge.
Download the mod.
Go to %appdata%.
Go to the C:\Users\User_Name\AppData\Roaming\.minecraft\mods folder.
Drag and drop the downloaded .jar file into it.
If one does not exist you can create one.
Play and enjoy!
effortlessbuilding_1.13.2_2.16.jar [0.48 Mb]
effortlessbuilding_1.12.2_2.6.jar [0.41 Mb]