Hi,
I suggest you start with:
Properly document the HW with schematics.
Make sure you can flash each LED in a simple program to make sure the PIC is running and that you can control each LED
And that you can read the sensor you have mentioned.
When that is done (which normally is the hardest part of a project) then you make a flow chart of what you want the software to do. Do you want to use delays or a real time clock with timers.
I am sure there are many people here that will help you correct the code but I doubt anyone will write your school project for free. Also I don't think it is a great idea if you get the code and HW setup here... and then even cant answer the most simple question when challenged by your teacher. Code is really a personal skill and if I were your teacher I would ask to make sure you know what you have done and not copied a already finished project from internet.
Oh.. by the way you might end up learning something that can be useful in the future..
so show us your best efforts and we will all help... ask for help when you get stuck and we will all help .. but dont ask us to do your homework
at least that is how I look at it
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