command help[+Rep]

Hello friends i need a help when any player type any unknown cmd then it shows like this

Unknown command

But i want to make it more attractive like this when player will type an unknown cmd then it will show a msg to us like this.



Error(red colour) you(white colour) enter(white) a(white) wrong(white) command(white) try(white) /'help(green) or /cmds(green)

Anyone



Srry for bad english!