Custom Auto Clicker in LG Ghub not working, unknown syntax error plus async coding?

Question

Foreword: I have never coded in LUA before so my code probably sucks and I'm probably doing something wrong.

I recently discovered the G-Shift function of LG mice, and decided to move my auto clicker to a G-Shift bound button (G-Shift + DPI-Shift (aka button 9 and button 6)). I also heard that creating an LUA script would make my auto clicker far faster than using their macros (not sure if that is true or not).

I went into my default profile and quickly coded up an auto clicker, but it didnt work. After a bunch of research and some help (mainly gemini and phind) I settled on this amalgamation:

local gShiftPressed = false
local dpiShiftPressed = false
local autoclicking = false  
function OnEvent(event, arg)
 --[[OutputLogMessage("Event: "..event.." Arg: "..arg.."")
 Mouse Button 9 = GShift
 Mouse Button 6 = DPI Shift--]]
 
 
 if (event == "MOUSE_BUTTON_PRESSED") then
  if (arg == 9) then
   gShiftPressed = true
  elseif (arg == 6) then
   dpiShiftPressed = true
  end
 elseif (event == "MOUSE_BUTTON_RELEASED") then
  if (arg == 9) then
   gShiftPressed = false
  elseif (arg == 6) then
   dpiShiftPressed = false
  end
 end
 
 
 
 
 if(gShiftPressed and dpiShiftPressed and not autoclicking) then
  autoclicking = true
  while(autoclicking == true) do
   PressAndReleaseMouseButton(1)
   if(not gShiftPressed and not dpiShiftPressed) then
    autoclicking = false
   end
  end
 end
end

I have 2 problems now:

1.) LG Ghub says I have a syntax error (I feel like I dont, but who knows)

2.) When my code was working, it would click continuously but never stop when i wanted it to

I tried thinking of an async solution, but i dont think Ghub supports Async coding