How to, need code for new Project, auto load, Arduino Troll Stick, Rick Rolling

Projects General Guidance
1

Hello Arduino Enthusiasts and Code Writing Machines

I am looking to create / modify / edit code that will auto load (via USB, hidden inside mouse) a program to pen test

I would like it to auto load as a mouse (tweensy I am sure) drop firewall, open Explorer and go to a predetermined website, YouTube video or something els fun
.
This will be used as a prank as well as an example of system vulnerabilities / pen test. I want a payload similar to the rubber ducky, but not looking to store any data, just want to log in, drop firewall etc

I have seen other devices but nothing with code.,

Please help

Thanks!!

penetration testing - rubber ducky- prank -

2

The Arduino Leonardo or Arduino Micro are ment to act like a mouse or keyboard.
I don't know if the Micro fits in a mouse.

http://arduino.cc/en/Main/arduinoBoardLeonardo
http://arduino.cc/en/Main/arduinoBoardMicro

There is a very easy to use library for them:
http://arduino.cc/en/Reference/MouseKeyboard