Player detector door lock

--Put a howler alarm on top of the computer if possible and u want an alarm
--also do 'edit startup'
--then put 'shell.run("program name")

players = {'player username goes here'}
pd = peripheral.wrap("Back") --player detector
text = 'Security Systems v2.1'
textLen = string.len(text)
tX, tY = term.getSize()

os.pullEvent = os.pullEventRaw --makes it so that u can't terminate the computer
--functions
function openDoor()
 rs.setOutput("bottom", true)
 sleep(3)
 rs.setOuput("bottom", false)
 sleep(0.1)
end

function alarm()
 redstoneOuput("top", true)
 sleep(2)
 redstoneOutput("top", false)
 sleep(0.1)
end

  function drawLine(char)
   for x = 1, tX
    term.setCursorPos(1, 1)
    term.write(char)
   end
   Term.setCursorPos(tX/2-textLen, 2)
   Term.write(text)
   term.setCursorPos(3, 1)
   for x = 1, tX
    term.write(char)
   end
  end

drawLine('*')

while true do
 event, p1 = os.pullEvent
 if event = "key" then
  if p1 = '16' then --Q key quits change the number only if u know
   break
  end
 end
 if event = "player"  then
  for p = 1, #players
   if p1 = players[p] then
    openDoor()
   end
  end
 if event = "redstone" then
  openDoor()
 end
end