Turtle Program

oldPull = os.pullEvent
os.pullEvent = os.pullEventRaw
while true do
        term.clear()
        term.setCursorPos(1,1)
        print("Fabrimat Computer Security 1.1")
        print("UserName: USERNAME")
        write("Password: ")
        if read("*") == "PASSWORD" then
                print("Access Granted.")
                sleep(2)
                term.clear()
                term.setCursorPos(1,1)
        print("Fabrimat Computer System")
                break
        else
                print ("Incorrect Login Details.")
                sleep(1)
        end
end
os.pullEvent = oldPull