Title changer

I am trying to create a script that will allow me to change the llSetText line through a channel command. Can anyone help me?

default
{
    state_entry()
      {
              llListen(11, "", llGetOwner(), "");
      }
     listen(integer channel, string name, key id, string message)
      {
               if(llToLower(message) == "blank")
                    {
                          llSetText("", <0,1,0>, 1);
                     }
                else
                     {
                           llSetText(message, <0,1,0>, 1);
                      }
      }
}

There's a simple one. Anything you say on channel 11 will be set as the text. If you say '/11 blank' it will blank the title.

Might need some syntax correction, this was off the top of my head. Done it in-game many times though, so it should work fine, generally.

Thank you very much, I really appreciate it!