need help

bar1 = paintutils.loadImage(".bar1")
logo = paintutils.loadImage(".logo")
icon = paintutils.loadImage(".icon")
tBarC = 8
tBartC = 1
backColor = 1
scroll = 0
Version = "Alpha [0.1]"
credCol = 32
firstCol = 1
secCol = 2048
Author  = "Mackan90096"
ErrCol1 = 16384
calcCol = 128

--Desktop
term.setBackgroundColor(backColor)
term.clear()

slc = 0



function credits()
term.clear()
term.setCursorPos(1,1)
term.setTextColor(credCol)
print("Credits")
term.setCursorPos(1,3)
print("Programs and apis:")
term.setCursorPos(1,5)
print("CCalendar - TheOriginalBIT")
term.setCursorPos(1,6)
print("Passgen -  Conn332")
term.setCursorPos(1,7)
print("CCleverbot - 1lann and GravityScore")
term.setCursorPos(1,9)
print("Help in development:")
term.setCursorPos(1,11)
print("All the great people that helped me on the forums! - You know who you are :)")
term.setCursorPos(1,13)
write("To return type anything and hit enter: ")
local input = read()
if input == "1" then
term.clear()
drawDesktop()
else
term.clear()
drawDesktop()
end
end

function login()
term.clear()
term.setCursorPos(1,1)
print("Logging in")
term.setCursorPos(1,3)
write("Username: ")
usrName = read()
write("Password: ")
local pass = read("*")
file = fs.open("users/"..usrName,"r")
if not fs.exists("users/"..usrName) then
term.clear()
term.setCursorPos(1,1)
print("Login failed")
sleep(1)
term.clear()
drawDesktop()
elseif fs.exists("users/"..usrName) then
local fileData = {}
local line = file.readLine()
repeat
table.insert(fileData, line)
line = file.readLine()
until line == nil -- readLine()
file.close()
local passFromFile = fileData[1]
if pass == passFromFile then
term.clear()
term.setCursorPos(1,1)
print("Login succeded!")
sleep(1)
term.clear()
drawDesktop2()
slc = 2
else
term.clear()
term.setCursorPos(1,1)
print("Login failed!")
sleep(1)
term.clear()
drawDesktop()
end
end
end

function register()
term.clear()
term.setCursorPos(1,1)
print("Registering")
term.setCursorPos(1,3)
write("Username: ")
local usrName = read()
term.setCursorPos(1,4)
write("Password: ")
local pass = read("*")
fs.makeDir("users")
if not fs.exists("users/"..usrName) then
local file = fs.open("users/"..usrName, "a")
file.writeLine(pass)
file.close()
sleep(0.5)
term.clear()
term.setCursorPos(1,1)
print("Registered!")
sleep(0.5)
term.clear()
drawDesktop()
elseif fs.exists("users/"..usrName) then
term.clear()
term.setCursorPos(1,1)
print("Username already in use!")
sleep(1)
term.clear()
drawDesktop()
end
end

function titleBar2()
  term.setCursorPos(1,1)
  term.setBackgroundColor(tBarC)
  term.setTextColor(tBartC)
  term.clearLine()
  term.setCursorPos(3,1)
  print("[Begin]")
  term.setCursorPos(12,1)
  print("Logged in as: "..usrName)
end

function drawDesktop2()
  slc = 2
  term.setBackgroundColor(backColor)
  term.clear()
  paintutils.drawImage(logo,1,1)
  paintutils.drawImage(icon,2,3)
  titleBar2()
end

function drawMenu2()
term.setTextColor(256)
term.setBackgroundColor(128)
term.setCursorPos(1,2)
print("          ")
term.setCursorPos(1,3)
print("Logout    ")
term.setCursorPos(1,4)
print("Calculator")
term.setCursorPos(1,5)
print("Games     ")
term.setCursorPos(1,6)
print("Account   ")
term.setCursorPos(1,7)
print("Calendar  ")
term.setCursorPos(1,8)
print("Email     ")
term.setCursorPos(1,9)
print("Shutdown  ")
term.setCursorPos(1,10)
print("Reboot    ")
term.setCursorPos(1,11)
print("          ")
end

function titleBar()
  term.setCursorPos(1,1)
  term.setBackgroundColor(tBarC)
  term.setTextColor(tBartC)
  term.clearLine()
  term.setCursorPos(3,1)
  print("[Begin]")
end

function drawDesktop()
  slc = 0
  term.setBackgroundColor(backColor)
  term.clear()
  paintutils.drawImage(logo,1,1)
  titleBar()
end

function drawMenu1()
term.setTextColor(256)
term.setBackgroundColor(128)
term.setCursorPos(1,2)
print("          ")
term.setCursorPos(1,3)
print(" Login    ")
term.setCursorPos(1,4)
print(" Register ")
term.setCursorPos(1,5)
print(" Reboot   ")
term.setCursorPos(1,6)
print(" Shutdown ")
term.setCursorPos(1,7)
print(" Passgen  ")
term.setCursorPos(1,8)
print(" Credits  ")
term.setCursorPos(1,9)
print("          ")
end
drawDesktop()

while true do
local event, button, X, Y = os.pullEventRaw()
 if slc == 0 then
  if event == "mouse_click" then
   if X >= 2 and X <= 8 and Y == 1 and button == 1 then
    drawMenu1()
    slc = 1
    drawDesktop()
   end
  end
 elseif slc == 1 then
  if X >= 1 and X <= 11 and button == 1 and Y == 3 then slc = 0
    login()
   elseif X >= 1 and X <= 11 and Y == 4 and button == 1 then slc = 0
   register()
   elseif X >= 1 and X <= 11 and Y == 5 and button == 1 then slc = 0
   os.reboot()
   elseif X >= 1 and X <= 11 and Y == 6 and button == 1 then slc = 0
   os.shutdown()
   elseif X >= 1 and X <= 11 and Y == 7 and button == 1 then slc = 0
   passgen()
   elseif X >= 1 and X <= 11 and Y == 8 and button == 1 then slc = 0
   credits()
   else slc = 0
   drawDesktop()

  end
  elseif slc == 2 then
  if X >= 1 and X <= 11 and button == 1 and Y == 3 then slc = 3
  elseif X >= 2 and X <= 5  and Y >= 3 and Y <= 9 and button == 1 then
     shell.run("file")

  else slc = 2
  drawDesktop2()
 end
 elseif slc == 3 then
   if X >= 2 and X <= 8 and Y == 1 and button == 1 then
    drawMenu2()
    slc = 2
    drawDesktop2()
 end

end
end