Color and date

Hello everyone ,







I am working on a chat programme and I was wondering how to separate the both usernames for example:







Server is me , and Client is the first man who had connected to me , so I want to be







Server to be in green color , and Client to be in Red







Server(green):Hi







Client(red):hello







Server(green):How you doin'







Client(red):Fine







.........







my second question is both of em' to have minutes and dates for example







27.05.2014 11:30pm Server(green):Hi







27.05.2014 11:31pmClient(red):hello







27.05.2014 11:32pmServer(green):How you doin'







27.05.2014 11:33pmClient(red):Fine