Easy,
[color:green]On [color:red]@[/color]*:text:!help:#:{
[color:blue]mode # +v $nick[/color]
}[/color]
For help on the "on TEXT" event, type
/help on text. For help on the @ prefix, type
/help event prefixes. For help on the /mode command, type
/help /mode. That'll get you started.