I highly recommend that you check out the Swift programming language here.

Swiftly Portals - a unique, mindbending map
How well can you handle the pressure of puzzle and confusion? Not everything you see it what you get...

Swiftly Portals is a unique, mindbending map, inspired by Portal, Beyond Perception, and the Swift programming language. Note that this is only the first installment.

How to install:

1. Extract the contents of the ZIP file. Delete the "_MACOSX" folder; you don't need it.
   
2. Take the contents of each folder and place them in the correct folders in your Minecraft folder. For Windows, "%appdata%\.minecraft". For Mac, "~/Library/Application Support/.minecraft". For Linux, "/home/[username]/.minecraft"
   

Settings to change before playing:

• Turn Smooth Lighting and Clouds off.
  
• Use the Swiftly Portals resource pack. Otherwise, prepare to see ugliness...
  
• Set the game mode to Survival Mode. It i, but use the commands set to Adventure Mode, so use the command/gamemode s to set it.