function again()
term.clear()
term.setCursorPos(1,1)
term.setCursorPos(14,7)
print" Log in/create new user"
term.setTextColor(colors.red)
term.setBackgroundColor(colors.black)
term.setCursorPos(12,9)
print"|New |"
term.setCursorPos(12,10)
print"|User|"
term.setCursorPos(33,9)
print"|Log |"
term.setCursorPos(33,10)
print"| In |"
term.setBackgroundColor(colors.white)
local running=true
while running==true do
  event,button,x,y = os.pullEvent("mouse_click")
  if (x>=33) and (x<=42) and (y>=9) and (y<=10) then
    shell.run"login"
    running=false
  elseif (x>=12) and (x<=18) and (y>=9) and (y<=10) then
      shell.run"NewUser"
  end
end
end

term.setBackgroundColor(colors.white)
term.clear()
term.setCursorPos(17,10)
term.setTextColor(colors.red)
print"Username:"
term.setCursorPos(17,11)
print"Password:"
term.setCursorPos(26,10)
term.setTextColor(colors.black)
username=read()
term.setCursorPos(26,11)
password=read("*")
if fs.exists("users/"..username) then
  file=fs.open("users/"..username,"r")
  local pass=file.readLine()
  if password==pass then
    print("                Loged in as " ..username)
    file.close()
    sleep(3)
    term.setBackgroundColor(colors.black)
    term.clear()
    term.setCursorPos(1,1)
  else
    print"                Incorrect password"
    sleep(3)
    again()
  end
else
  print"                Unknown username"
  sleep(3)
  again()
end