Why won't the script work, output is completely clear?

Here is the script:

local jun = game.Players.LocalPlayer
Stuff = false

function ssj()
if Stuff == false then
Stuff = true

 demm1 = Instance.new("Decal")
demm1.Name = demm1
demm1.Texture = game.ReplicatedStorage.Dem1.Texture
demm1.Face = game.ReplicatedStorage.Dem1.Face
demm1.Parent = jun.Character.Head
end

function nossj()
demm1:Destroy()




end

jun.Chatted:connect(function(Msg)
local msg = Msg:lower()
if string.sub(msg, 1, 7) == "demon1" then
wait(0.1)
ssj()
end
if string.sub(msg, 1, 13) == "dem1" then
wait(0.1)
ssj()
end
if string.sub(msg, 1, 6) == "/e dem1" then
wait(0.1)
ssj()
end
if string.sub(msg, 1, 10) == "/e off" then
wait(0.1)
nossj()
end
if string.sub(msg, 1, 3) == "off" then
wait(0.1)
nossj()
end
end)
end

It is supposed to put a decal on the local player's face when he/she says certain words,the game is filtering enabled and to repeat the output is clear.I would appreciate some help.