OS

if fs.exists("config.txt") == true then

local file = fs.open("config.txt", "r")
local config = file.readAll()
file.close()

local lines = {}
for line in string.gmatch(config, "[^\r\n]+") do
    table.insert(lines, line)
end

local name = lines[1]

print("Hello ".. name .." please enter your password.")

right = lines[2]

function password()
    entered = read("*")
    if entered == right then
        print("Correct welcome ")
        sleep(1)
        shell.run("clear")
        shell.run("windows")
        else
        print("Wrong password")
        sleep(0.5)
        shell.run("clear")
        print("Try again")
        password()
    end
end

password()

else
shell.run("register")
end