I have to finish my work before the term begins.And I'm really tired with it.I've done three kind of this work during the vacation and this is the most complicated one.The principal assigned the work to four people,with four parts.Each people finish one part and then we combine it as the whole item.But there're some inner-relationship between these parts,in other words,it's hard to be separated.Each one has his own idea,and may have different structure of this programme.Now I'm at a mess and don't know how to start.I need to think about it thoroughly.