How to make message only pop up one time?

Put a variable at the top like this:

local activated = false

function message(m)
    if activate == false then
        activated = true
        m.Text = "How do I make you pop up once?"
        wait(5)
    end
end

since you're connecting to an event, you can disconnect the function once you're done with RBXScriptConnection:Disconnect()

in your code, that would look something like this:

local connection -- define the variable before the function, because the function needs to be able to access it
local activated = false -- if you need to know if the part was touched for whatever reason

local function onTouch(hit)
    if whatever then
        if blahBlahBlah then
            -- stuff goes here
            activated = true
            connection:Disconnect()
        end
    end
end
connection = script.Parent.Touched:Connect(onTouch) -- when you Connect to an event, it returns an RBXScriptConnection which you can use to disconnect the function later

also, make sure you put local whenever you define a variable or function

why? it's good practice

why is it good practice? it's faster when you do that, also there's global environment blah blah blah whatever It's Not Good stuff but i'm not advanced enough to tell you why global environment is bad

Hello! I can see your issue! I'd suggest using tables to store players that have already touched the brick, like so:

function message(m)



---------------------------------------------------------------\\


m.Text = "How do I make you pop up once?"
wait(5)




---------------------------------------------------------------//

-- Color codes:
-- (1,0,0) is Red
-- (0,1,0) is Green
-- (0,0,1) is Blue
-- (1,1,1) is White
-- And you can also mix colors. (1,0,1) is Purple for example

-- For more settings, read the green text around the section below

local AlreadyTouched = {}





end
function onTouch(hit)
local AlreadyTouched = false--Automatically determines player has not touched
    for i, player in pairs(AlreadyTouched) do--Checks for player that already touched
        if hit.Parent.Name == player then
            AlreadyTouched = true--Player has already touched
        end

    end
   if AlreadyTouched == false then
 if hit.Parent:FindFirstChild("Humanoid") ~= nil then
table.insert(AlreadyTouched,hit.Parent.Name)--Adds player to table

        if game.Players:FindFirstChild(hit.Parent.Name) ~= nil then
        local player = game.Players:FindFirstChild(hit.Parent.Name)

            if player:FindFirstChild("PlayerGui"):FindFirstChild("ScreenGui") == nil then
            sg = Instance.new("ScreenGui")
            sg.Parent = player:FindFirstChild("PlayerGui")
            end

        if player.PlayerGui.ScreenGui:FindFirstChild("MessageBox") == nil then

                    -- In this section below, you can edit how the text box looks like
        local f = Instance.new("Frame")
        f.Name = "MessageBox"
        f.Position = UDim2.new(0.3, 0, 0.1, 0)
        f.Size = UDim2.new(0.4, 0, 0, 0)            -- If Text box needs to be bigger, simply change "0.4"
        f.Style = "RobloxRound"                         -- Styles: "ChatBlue", "Chat Red", "Chat Green"
        f.Parent = player.PlayerGui:FindFirstChild("ScreenGui")

        local m = Instance.new("TextLabel")
        m.Position = UDim2.new(0.5, 0, 0.5, 500)
        m.FontSize = "Size14"                           -- Font Sizes: 10, 11, 12, 14, 18, 24
        m.TextColor3 = Color3.new(1,1,1)                -- Colors: (1,0,0) = Red, (0,1,0) = Green, (0,0,1) = Blue
        m.Parent = f

        message(m)


        f:Destroy()
        end
        end
    end
end
end

script.Parent.Touched:connect(onTouch)

If you have any questions, comment below!

Best,

TheLastHabanero