How To Insert More Code For More Items?

I wanna make it have diffrent codes with diffrent items.

local plr = script.Parent.Parent.Parent.Parent.Parent
script.Parent.MouseButton1Click:connect(function()
	if script.Parent.Parent.Input.Text == 'Code' then 
		script.Parent.Parent.Input.Text = ""
		script.Parent.Text = 'Success!'
		local b = game.Lighting.Sign:Clone()
		b.Parent = plr.Backpack
		wait(1)
		script.Parent.Text = 'Submit'
		script.Parent.Parent.Input.Text = 'Enter code here'
	else
		script.Parent.Parent.Input.Text = 'Enter code here'
		script.Parent.Text = 'Invalid Code'
		wait(1)
		script.Parent.Text = 'Submit'
	end
end)