4 questions for my app

[NavTux]

I need to do a erlang chat application to show the performance

Basically I should know the basic things to do

1.What are the tools to use?

2.What are the modules i need to have?

3.How many days i have to take?

4.Finally How should it contailn?


I am having these questions in my mind steadily,but as well as i
should know the answers soon to start my contribution can you help me??