[ComputerCraft] Password protected door

os.pullEvent = os.pullEventRaw -- This prevents people from closing the program with ctrl + t
local side = "left" -- What side is the door on?
local password = "password" -- What is the main password?
local debug = "debug password" -- The debug password will quit the password program allowing you to edit the system
local stayOpen = "stay open password" -- This password will keep the door open
local opentime = 5 -- How long (With the standard password) should the door stay open?


while true do -- Keep the program running
 term.clear() -- Clear the screen of any text
 term.setCursorPos(1,1) -- Set the "cursor" to the top left hand side of the screen
 write("Please Input Your Password: ") -- Request password, I used write because it does not start a new line
 local input = read("*") -- This defines the local variable "input" and it is equivenent to read("*"), this means that it will store what the user entered in in an attempt to open the door, the read() has a "*" in it so it will print * instead of what the user is entering
 if input == password then -- If what the user entered in was the same as the password defined above
  term.clear() -- Clear the screen
  term.setCursorPos(1,1) -- set cursor to top left corner
  print("Password correct!") -- Tell the user they entered the correct password
  rs.setOutput(side,true) -- sets the redstone output on side (Defined on line 2) to true
  sleep(opentime) -- waits for opentime (Defined on line 6)
  rs.setOutput(side,false) -- sets the redstone output on side (Defined on line 2) to false
elseif input == debug then -- elseif means if it does not match the if statement above then if it matches this elseif statement run it... Here it checks if the user entered the "debug" password.
 error() -- I have found exit() to print stuff to the console so I used error() to close the program
elseif input == stayOpen then -- another elseif statement, this time seeing if they entered the "stayOpen" password
 rs.setOutput(side,true) -- sets the redstone output on side (Defined on line 2) to true
 term.clear() -- Clear the screen
 term.setCursorPos(1,1) -- Set the cursor to top right corner
 print("The door will stay open until you press a key") -- Tell them they need to press a key to close the door
 local event, keyCode = os.pullEvent("key") -- this waits for a key press event
 rs.setOutput(side,false) -- sets the redstone output on side (Defined on line 2) to false
else -- If it is not any of those passwords...
  print("Password incorrect!") -- Tell the user that
  sleep(2) -- Wait for 2 seconds
 end -- end the if password part
end -- end the while true do loop