Simple onButton1Down() function not working?

What is wrong with this onButton1Down() function? Its supposed to fire when anything in the game is clicked on but it doesn't. What am i doing wrong?

local sGui=script.ScreenGui
local frame=sGui.Frame
local player=game.Players.LocalPlayer
local mouse=player:GetMouse()
local pGui = script.Parent.Parent.PlayerGui

local function onButton1Down()
    local targ=mouse.Target
	
--if part:FindFirstChild("examine")~= nil 
	--then 
	--sGui.Parent = pGui
   -- frame.Visible=true
	print("success")
--else 
--	print("fail")
--end


 
end
mouse.Button1Down:Connect(onButton1Down)

local sGui=script.ScreenGui
local frame=sGui.Frame
local player=game.Players.LocalPlayer
local mouse=player:GetMouse()
local pGui = script.Parent.Parent.PlayerGui

function onButton1Down()
    local targ=mouse.Target

--if part:FindFirstChild("examine")~= nil 
    --then 
    --sGui.Parent = pGui
   -- frame.Visible=true
    print("success")
--else 
--  print("fail")
--end



end
mouse.Button1Down:Connect(onButton1Down)

Here you go.