Whats wrong with my disco script?

Whats wrong with this? I've re-written this 4 times and it still doesn't work.. Can somebody help?

local group = {
    ["WildLasVegas"] = true;
    ["Senias"] = true;
}

game.Players.PlayerAdded:connect(function(player)
    if group[player.Name] then 
        player.Chatted:connect(function(msg)

            if (msg == "disco") then    
    script.Parent.Color = Color3.new(math.random(), math.random(), math.random())
wait(0.5)


            end          
        end)
    end
end)