ulx cloak at the start of the round

[ozzyos2009]

I'm making a custom round on TTT that'll cloak traitors. I've tried using ply:concommand, RunConsoleCommand etc.
Wasn't working so I looked over at the ULIB for invisible and I just don't understand it.
Is there a simple way to make traitors cloaked?

Something that would look like this:

Code: [Select]

for _,ply in pairs(player.GetAll() ) do
     if ply:GetRole() == ROLE_TRAITOR then
           v:ConCommand("ulx", "cloak", "^", 225)
     end
end