How can I call a function from a function which is above the function?

In my script there are many functions. I want to call one function from the other, but the problem is that the function which will be calling another function is above the function it will be calling, and not below it so it is giving me errors. You might be saying to switch the places, but in my script there are a lot of functions, and if I switch the places of the functions then the other functions will have the same problem! Please tell me how I can make this work.

Here is the script:

local Gui = function()
	-- Code here
	timeLimit() -- It errors here
end

local startRound = function()
	-- Code here
	Gui()
end

local timeLimit = function()
	-- Code here
	startRound()
end

game.Players.PlayerAdded:Connect(startRound)

As you can see I am trapped in this situation. I don't know how to make it possible for the top function to be able to call the bottom function. Any type of help is appreciated!

roblox needs to load the function in first but this is still possible:

local Gui = function()
	-- Code here
end
	 
local startRound = function()
	-- Code here
end
	 
local timeLimit = function()
	-- Code here
end

while wait(1) do
	-- put these in the order you want
	timeLimit()
	startRound()
	Gui() 
end

or if you are just firing it once:

local Gui = function()
	-- Code here
end
	 
local startRound = function()
	-- Code here
end
	 
local timeLimit = function()
	-- Code here
end

Gui()
startRound()
timeLimit()

hope this helped it my first ever post :)

Try to put all your functions on the top, then the code that calls those functions below.