Whats the script for `Push a key to run a script`?

I`ve been trying to figure out how to run a certain script by pressing a key. Also if you could add how to make it so the owner of the game can only run it then thanks.

Use UserInputService for the key part, found here: https://wiki.roblox.com/index.php?title=API:Class/UserInputService/InputBegan

Then use If statements (conditional statements) to detect the players name and or UserId: http://robloxdev.com/articles/Conditional-Statements-in-Lua

Then you'd want to change the WalkSpeed of the Humanoid, properties of the humanoid: http://wiki.roblox.com/index.php?title=API:Class/Humanoid