Trailer Back up simulator

I want a very simple internet based tool that allows people to input date on trailer size, weight, length and axle location, and the help them calculate a driveway angle, so see if the trailer can be backed up the driveway without hitting the back or the or the tongue. I want a little 2-d black and white simulator that shows the attempts after the data has been input. With your estimate please give examples of work like this you have done or I will not respond.