Why won't my leaderstat go up?

This is in a local script, but it sort of needs to be in a local script so I'm confused what to do. is it the square brackets? Please help.

--Your wins.
local yw = game.Players.LocalPlayer.leaderstats.Wins.Value
--Your losses.
local yl = game.Players.LocalPlayer.leaderstats.Losses.Value
--Button.
local button = script.Parent["Flip a card"]
--Your Move.
local ym = script.Parent["Your move"]
--Their Move.
local tm = script.Parent["Their move"]
--Winner board.
local wb = button.Label


--Function for button.
function pressed()
	--Your move number.
	local ymn = math.random(1,10)
	--Their move number.
	local tmn = math.random(1,10)
	--Labelling.
	ym.Text = ymn
	tm.Text = tmn
	--Logic.
	if ymn > tmn then
		wb.Text = "You win!"
		yw = yw + 1
	else
		wb.Text = "You lost!"
		yl = yl + 1
	end
end


--binding function
button.MouseButton1Down:connect(pressed)

When I put it into a Normal script and modded it it still wouldn't work

--Your wins.
local yw = script.Parent.Parent.Parent.Parent.leaderstats.Wins.Value
--Youre losses.
local yl = script.Parent.Parent.Parent.Parent.leaderstats.Losses.Value
--Button.
local button = script.Parent["Flip a card"]
--Your Move.
local ym = script.Parent["Your move"]
--Their Move.
local tm = script.Parent["Their move"]
--Winner board.
local wb = button.Label


--Function for button.
function pressed()
	--Your move number.
	local ymn = math.random(1,10)
	--Their move number.
	local tmn = math.random(1,10)
	--Labelling.
	ym.Text = ymn
	tm.Text = tmn
	--Logic.
	if ymn > tmn then
		wb.Text = "You win!"
		yw = yw + 1
	else
		wb.Text = "You lost!"
		yl = yl + 1
	end
end


--binding function
button.MouseButton1Down:connect(pressed)