def logmein():
    for i in range(3):
        username = raw_input("Please enter your username: ");
        password = raw_input("Please enter your password: ");
        realuser = "dom"
        realpass = "dominic"

        if username == realuser and password == realpass:
            print "Well done, this script worked"
            time.sleep(2)
            break # Exits loop
        else:
            print "Sorry, login unsuccesful (" + str(2 - i) + " tries left.)"
            time.sleep(2)

logmein()