Dark lock - terminal lock program

print("---------------Welcome!----------------")
print("---------Dark lock installer!----------")
print("---------------------------------------")
print("This will install Dark Lock 1.4 to your")
print("---------Minecraft Computer------------")
print("")
print(" 1. Install Dark lock")
print(" 2. Exit ")
print("---------------------------------------")
print(" Warning! Dark lock will overide ")
print(" Your default startup program")
print("")
write("type a number then press enter: ")
user=io.read()

function makeprogram()
term.clear() term.setCursorPos(1,1)
print("Looking for old startup file...")
sleep(1)
if fs.exists("startup") == true then
shell.run("rm", "startup")
print("Startup file found, deleting...")
sleep(1)
end
if fs.exists("setup") == true then
shell.run("rm", "setup")
end
if fs.exists("lock/conf") == true then
shell.run("rm", "lock/conf")
end
if fs.exists("lock/attempt") == true then
shell.run("rm", "lock/attempt")
end

sleep(1)

print("Making new directory...")
shell.run("mkdir", "lock")
sleep(2)

print("Copying Files...")
print("")
sleep(1)

file = io.open("lock/attempt","w")
file:write("")
file:close()

file = io.open("lock/conf","w")
file:write("")
file:close()

shell.run("cp", "disk/lock", "/startup")
if fs.exists("startup") == true then
print ("Startup copy... Success")
else
print ("Startup copy... Failed")
end

sleep(1)
print("")

shell.run("cp", "disk/setup", "/")
if fs.exists("setup") == true then
print ("setup copy... Success")
else
print ("setup copy... Failed")
end

sleep(1)
print("")
print("Install completed")
sleep(1)
print("")
print("now running setup")
sleep(2)

shell.run("setup")
end

--running program

if user=="1" then
term.clear() term.setCursorPos(1,1)
print("Running install...")
sleep(2)
makeprogram()
end
if not(user=="1") then
term.clear() term.setCursorPos(1,1)
print("Exiting...")
sleep(2)
term.clear() term.setCursorPos(1,1)
shell.run("startup")
end

--Title: Dark lock 1.4
--Version: Ver. 1.4
--Author: Darkrising (minecraft alias djhannz)
--Platform: ComputerCraft LUA Virtual Machine
--Notes: lock program with lockout period
--config
--numbers are in seconds
dofile("lock/attempt")
dofile("lock/conf")
counter=0
attemptcounter=0
i=0
yes=0

function timercheck()
	if (istimergoing == 1) then
	term.clear() term.setCursorPos(1,1)
	print("You attempted to restart the computer!")
	print("")
	print("Restarting Countdown.")
	pcall(sleep,3)
	countdown()
	end
end
function beforelock()
timercheck()
if counter==numberofattempts then
pcall(countdown)
end
if not (counter == numberofattempts) then
lock()
end
end
function lock()
repeat
status, user=pcall(read,"*")
if user == pass then
term.clear() term.setCursorPos(1,1)
screenwrite("Password Correct",1)
pcall(sleep,1)
term.clear() term.setCursorPos(1,1)
shell.run("shell")
yes=1
end

if not (user == pass) then
term.clear() term.setCursorPos(1,1)
attemptcounter=attemptcounter+1
counter=counter+1
screenwrite("Incorrect Attempts: "..attemptcounter,1)
lineacross("-",2)
screenwrite("Wrong Password",3)
print("")
write("Password: ")
i=i+1
beforelock()
end
until yes==1
end
function countdown()
cou=lockoutperiod
	repeat
		pcall(sleep,1)
		term.clear() term.setCursorPos(1,1)
		cou=cou-1
		screenwrite("Too many wrong attempts",1)
		screenwrite("Please wait "..cou.." Seconds before trying again",2)
			file = io.open("lock/attempt","w")
			file:write("istimergoing = ".. 1)
			file:close()
	until cou==0
attemptcounter=0
			file = io.open("lock/attempt","w")
			file:write("istimergoing = ".. 0)
			file:close()
			istimergoing = 0
counter=0
cou=lockoutperiod
term.clear() term.setCursorPos(1,1)
screenwrite("Incorrect Attempts: "..attemptcounter,1)
lineacross("-",2)
screenwrite("Wrong Password",3)
print("")
write("Password: ")
beforelock()
end
function screenwrite(text, line)
  x,y = term.getSize()
  l = string.len(text)

  x = (x/2 - l/2)
  term.setCursorPos(x,line)
  term.write(text)

  cx, cy = term.getCursorPos()
  term.setCursorPos(1, cy+1)
end
function lineacross(text, line)
  x,y = term.getSize()
  term.setCursorPos(x,line)

  for i=1,x do
	term.setCursorPos(i,line)
	term.write(text)
  end
  cx, cy = term.getCursorPos()
  term.setCursorPos(1, cy+1)
end

term.clear() term.setCursorPos(1,1)
lineacross("-",1)
screenwrite("Welcome!",2)
screenwrite("This computer is running Dark lock 1.4",3)
lineacross("-",4)
write("Password: ")
beforelock()

term.clear() term.setCursorPos(1,1)
print("Welcome to Dark Lock setup")
print("Press Enter to continue...")
io.read()

file = io.open("lock/conf","w")

term.clear() term.setCursorPos(1,1)
write("Type your new password: ")
pass=read("*")

term.clear() term.setCursorPos(1,1)
print("Type number of attempts before lockout: ")
print("default: 5")
write(": ")
attempts=io.read()
if (attempts == "") then
attempts = 5
end

term.clear() term.setCursorPos(1,1)
print("Type the new lockout duration: ")
print("defualt: 30")
write(": ")
lockout=io.read()
if (lockout == "") then
lockout = 30
end

file:write("pass = "..[["]]..pass..[["]].." numberofattempts="..attempts.." lockoutperiod="..lockout)
file:close()

term.clear() term.setCursorPos(1,1)
print("Setup complete!")
sleep(1)
print("rebooting...")
sleep(2)
shell.run("startup")