MC Computer Craft *WinXP v1 [DGU]

-- this Required Command Block Support Enable
-- set it true
-- WinCraft XP [DGU]
-- set your name on "u", set your username in computercraft "un", set your password in computercraft "pw"
-- this saving your XP on computer craft
-- note : i highly fix and make sure is Working all! if there are errors
-- u -> balance show, (withdraw xp, deposit xp:commandblock)
-- un -> account required signup
-- pw -> account required signup
-- cmd = peripheral.wrap("<sides>") -> command block side -> trigger decrease/increase XP uses withdraw or deposit
-- Warning don't place there a letter when this file are running except in u,un,pw/username,password

u = ""
un = ""
pw = ""
print (u..' User')
be = fs.open(un, "r")
mybe = be.readLine()
be.close()

print ('your balance here! is $'..mybe)
write("User Name :")
unw = read()
if un == unw then
 print 'UserName Correct'
else
 print 'UserName Incorrect!'
 sleep(2.5)
 os.reboot()
end
write("Pass Word :")
pww = read("*")
if pw == pww then
 print 'PassWord Correct'
else
 print 'PassWord Incorrect!'
 sleep(2.5)
 os.reboot()
end

sleep(1)

print '[1] Deposit XP'
print '[2] Withdraw XP'
write("[Num] >")
cenum = read()
if cenum == "1" then
 print 'How many do you want to Deposit :'
 write(" XP >")
 wlvld = read()
 if fs.exists(un) then
  local rrlvld = fs.open(un, "r")
  readlvl = rrlvld.readLine()
  rrlvld.close()
  cmd = peripheral.wrap("back")
  cmd.setCommand("xp -"..wlvld.."l "..u)
  cmd.runCommand()
  shell.run("rm "..un)
  local cclvld = fs.open(un, "w")
  cclvld.writeLine(wlvld+readlvl)
  cclvld.close()
  sleep(0.1)
  os.reboot()
 else
  local crlvld = fs.open(un, "a")
  crlvld.writeLine("0")
  crlvld.close()
  sleep(0.1)
  os.reboot()
 end
end
if cenum == "2" then
 print 'How many do you want to Withdraw'
 write(" XP >")
 rlvld = read()
 if fs.exists(un) then
  local readlvld = fs.open(un, "r")
  readlvl = readlvld.readLine()
  readlvld.close()
  cmd = peripheral.wrap("back")
  cmd.setCommand("xp "..rlvld.."l "..u)
  cmd.runCommand()
  shell.run("rm "..un)
  local cclvld = fs.open(un, "w")
  cclvld.writeLine(readlvl-rlvld)
  cclvld.close()
  sleep(0.1)
  os.reboot()
 else
  local crlvld = fs.open(un, "a")
  crlvld.writeLine("0")
  crlvld.close()
  sleep(0.1)
  os.reboot()
 end
end