Hi,
Welcome to the forum.
Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html
Do you want your motors to change direction?
If you are on campus, then you have the best source of advice to your queries.
Go to the Electronics Faculty and ASK, they are obliged to help as it is a scholastic project that you need to complete your course.
Ask for a referral from your Mechanical tutor/lecturer, I worry that you are in 5th year and asking here.
Tom.... 