Forums Scripts & Popups How would i do this? Im a noob

I want to add a command to my bot where people can request what to get added to it how would i make it write the hole text that they write?

on *:TEXT:@requestadd:#: { write requestadd.txt
}


So i want it like

on *:TEXT:@requestadd:#: { write requestadd.txt {Text they say}
}