What is happening with this gui resizing script?! I've been at this for more than 2 hours!

local player = script.Parent.Parent.Parent.Parent
local playername = player.Name
local character = game.Workspace:WaitForChild("" .. playername .."")
local humanoid = character:WaitForChild("Humanoid")
local health = script.Parent.Green
local plrhealth = humanoid.Health
local plrmaxhealth = humanoid.MaxHealth
plrmaxhealth = 100
plrhealth = 100
local RunService = game:GetService("RunService")
local e = false
local e2 = 0

RunService.RenderStepped:Connect(function()
	if plrhealth < 100 then
		local damage = 100 - plrhealth
		e = true
		repeat until e == false
			health.Size.X = 0.7 - sizedown
			e2 = e2 + 1
			if e2 == damage then
				e2 = 0
				e = false
			end
		end
	end
end) -- Script error here

Error:

Expected ')' (to close'(' at line 14), got 'end'

I've been trying to fix this for a little bit more than 2 hours, researching on many different sites including Scripting Helpers and the Roblox Wiki, and I can't figure out why this is happening.

Please help me I'm loosing my sanity,

Narwhal