Clone the application to your computer
it contains two files server.rb and client.rb open terminal and nevigate to the directory where they are located
first create a server as follows
ruby server.rb 3000 "localhost"
it will create a server at port 3000 and ip "localhost" it will wait for the clients to be connected
open another window of terminal and initialize clients as follows
ruby client.rb "localhost" 3000
or you can connect by telnet command
telnet "localhost" 3000
similarly you can initialize multiple clients by opening multiple windows