How to make a timer start when a text button is pressed?

I am making a game where when a frame pops up asking if you accept the challenge, a timer should start after you hit the button and end once you complete the challenge. Most of the timer scripts I find have the timer starting as soon as the server opens. How do I go about doing this?

The closest thing I've found to what I want to happen is:

local text = script.Parent

local seconds = 59

local minutes = 14

local secondsDisplay = ""

local minutesDisplay = ""

for m = minutes, 0, -1 do

if m < 10 then

	minutesDisplay = "0"..m

else

	minutesDisplay = m

end

for s = seconds, 0, -1 do

	if seconds > 59 then

		s = 59

	end

	if s < 10 then

		secondsDisplay = "0"..s

	else

		secondsDisplay = s

	end

	text.Text = minutesDisplay..":"..secondsDisplay

	wait(1)

end

end

The problem is that it starts as soon as the server opens and I need it to wait until the accept button is clicked.

#TICK()

Tick() provides the time in seconds that has passed since 1st of January of 1970. It actually provides quite a few uses.

In this case, we would want to get the time since the invitation got accepted

local AcceptButtonName = "Accept"; -- the name of the accept button
local DeclineName = "Decline"
local Count = false

local tim = tick()

function AcceptedInvite()
local AcceptedTime = tick()

	local Difference = (tim - AcceptedTime)

	return Difference
end

script.Parent[AcceptButtonName].Activated:Connect(function()
	Count = true
end)

script.Parent[DeclineName].Activated:Connect(function()
	Count = false
end)

while wait(1) do
	if Count == true then
	    local Current = AcceptedInvite()
	
	    print(Current)
	end
end

local timerbutton = game.StarterGui.Button --make a button

timerbutton.MouseButton1Click:Connect(function()
for i = 1, 10, 1 do
timerbutton.Text = i 
end
end)