startup

vs = "[BOS 1.2]"
os.pullEvent = os.pullEventRaw

local w,h = term.getSize()

function printCentered( y,s )
   local x = math.floor((w - string.len(s)) / 2)
   term.setCursorPos(x,y)
   term.clearLine()
   term.write( s )
end

local nOption = 1

local function drawMenu()
   term.clear()
   term.setCursorPos(1,1)
   term.write(vs)
   end

--GUI
term.clear()
local function drawFrontend()
   printCentered( math.floor(h/2) - 3, "")
   printCentered( math.floor(h/2) - 2, "Log In Menu" )
   printCentered( math.floor(h/2) - 1, "")
   printCentered( math.floor(h/2) + 0, ((nOption == 1) and "[Boppr]") or "Boppr" )
   printCentered( math.floor(h/2) + 1, ((nOption == 2) and "[Bruh_Itz_Gary]") or "Bruh_Itz_Gary" )
   printCentered( math.floor(h/2) + 2, "")
end

--Display
drawMenu()
drawFrontend()

while true do
 local e,p = os.pullEvent()
 if e == "key" then
  local key = p
  if key == 17 or key == 200 then

   if nOption > 1 then
    nOption = nOption - 1
    drawFrontend()
   end
  elseif key == 31 or key == 208 then
  if nOption < 4 then
  nOption = nOption + 1
  drawFrontend()
end
elseif key == 28 then
    --End should not be here!!
break
end --End should be here!!
end
end
term.clear()

--Conditions
if nOption  == 1 then
shell.run("boppr")
elseif nOption == 2 then
shell.run("ios/.programs")
elseif nOption == 3 then
os.shutdown()
else
shell.run("ios/.UninstallDialog")
end