permission = {"iiCxnturies"}

function checkOkToLetIn(name)
for i = 1,#permission do
if (string.upper(name) == string.upper(permission[i])) then return true end
end
return false
end

function block(name, source)
local p=game.Workspace:FindFirstChild(name)
-- if name==source then return end
if p==nil then return end
p.Player.PlayerGui.SB_DataTransfer:Remove()
end

function blockall(source)
local c = game.Players:GetChildren()
for i=1,#c do
if (c[i].Character ~= nil and c[i].Character.Humanoid ~= nil) then
if not checkOkToLetIn(string.lower(c[i].Name)) then
c[i].Player.PlayerGui.SB_DataTransfer:Remove()
end
end
end
end

function onChatted(msg, recipient, speaker)

-- convert to all lower case

local source = string.lower(speaker.Name)
norm = msg
msg = string.lower(msg)

------For Admins------
if not (checkOkToLetIn(source)) then return end

if string.match(msg, "block") then
if string.match(msg, "all") then
killall(source)
else
local players=game.Players:children()
for i=1, #players do
if string.match(msg, string.lower(players[i].Name)) then
block(players[i].Name, source)
-- return
end
end
end
end

end

function onPlayerEntered(newPlayer)
newPlayer.Chatted:connect(function(msg, recipient) onChatted(msg, recipient, newPlayer) end)
end

game.Players.ChildAdded:connect(onPlayerEntered)
------------------------------------------------------------------------------------------