How do I add in commands?

The Commands script is used to allow for voice commands for various things, such as making random explosions, or changing the time of day. SonOfSevenless is the original maker of the following script, though many script of this type have been created throughout Roblox.

Version 3 by Brandonhare

-- SonOfSevenless originaly made this but I added a lot.

--Feel free to edit this but if it crashes then it's not my fault.
--Brandonhare

--Please leave the 4 above lines alone.