I'll add to Michael's excellent advice: your statement (not really a question) is incredibly broad and vague. It almost sounds like ike you want us to do the work for you.
This sounds like the same model that everyone does. In other words, there's already a lot of material for you to use.
I'll assume you've already done a review of the existing literature on this topic. Now, go look at the models library and see what you can use!
Before coding, make sure you plan / design / think about what would are modeling at least a little.
Good luck.