i decided to add the train to give a better animation, this will move slowly along the rails, this was created the same way as the rest of the buildings to give an interior, at first i created the front of the train, i then copied this and altered it slight. getting rid of the sloped front and making it flat, i then copied this a few times to give several more compartments, and then copied and rotated the front again to give the other end of the train. i then group all the sections of the train to make it one part, so when i made it move, it moved all together.