How do I run two while True statements in python?

I am trying to make a door swipe card system in Python for my Raspberry Pi. I broke the program into two: A Door Alarm and a Card Swipe Recording system. The two programs work individually but how do I combine the two programs into one python file? I've tried threading but it doesn't seem to work.

Below are the programs: 1.) Door Alarm: If door is left open for a certain duration, an led will blink, then an alarm will ring

import time
import RPi.GPIO as gpio

led = 37
buzzer = 11
door = 16

gpio.setmode(gpio.BOARD)
gpio.setwarnings(False)
gpio.setup(buzzer, gpio.OUT)
gpio.setup(led, gpio.OUT)
gpio.setup(door, gpio.IN, pull_up_down=gpio.PUD_UP)


def blink(buzzer):
    gpio.output(buzzer, True)
    time.sleep(0.1)
    gpio.output(buzzer, False)
    time.sleep(0.1)
    return

def blink(led):
    gpio.output(led, True)
    time.sleep(1)
    gpio.output(led, False)
    time.sleep(1)
    return

while True:
    if gpio.input(door):
        time.sleep(3)
        for i in range(0,5):
                blink(led)
        for i in range (0,5):
                blink(buzzer)
    else:
        gpio.output(buzzer, False)

gpio.cleanup()      

2.) Card Swipe Recording System: When someone swipes their card, the led blinks and a picture is taken

import datetime
import time
import os
import RPi.GPIO as gpio

led = 37
t = datetime.datetime.now()

gpio.setmode(gpio.BOARD)
gpio.setwarnings(False)
gpio.setup(led, gpio.OUT)

def blink(led):
    gpio.output(led, True)
    time.sleep(0.1)
    gpio.output(led, False)
    time.sleep(0.1)

while True:
    card = raw_input()
    f = open("Laptop Sign Out" + '.txt', 'a')
    f.write("OneCard Number: " + card[1:10] + " Time: " + t.strftime("%m-%d-%Y %H:%M:%S"))
    f.write('\n')
    f.write(';')
    f.write('\n')
    f.close()
    time.sleep(1)
    for i in range(0,3):
        blink(led)
    os.system('fswebcam ~/Desktop/Photos/%H%M%S.jpeg')
    time.sleep(3)

gpio.cleanup()

(UPDATE) Also, below is my attempt at threading:

import time
import RPi.GPIO as gpio
import os
import datetime
from threading import Thread

led = 37
buzzer = 11
door = 16
t = datetime.datetime.now()

gpio.setmode(gpio.BOARD)
gpio.setwarnings(False)
gpio.setup(buzzer, gpio.OUT)
gpio.setup(led, gpio.OUT)
gpio.setup(door, gpio.IN, pull_up_down=gpio.PUD_UP)


def blink(buzzer):
    gpio.output(buzzer, True)
    time.sleep(0.1)
    gpio.output(buzzer, False)
    time.sleep(0.1)
    return

def blink(led):
    gpio.output(led, True)
    time.sleep(1)
    gpio.output(led, False)
    time.sleep(1)
    return

def doorsensor():
    while True:
        if gpio.input(door):
            time.sleep(3)
            for i in range(0,5):
                    blink(led)
            for i in range (0,5):
                    blink(buzzer)
        else:
            gpio.output(buzzer, False)

def cardreader():
    while True:
        card = raw_input()
        f = open("Laptop Sign Out" + '.txt', 'a')
        f.write("OneCard Number: " + card[1:10] + " Time: " + t.strftime("%m-%d-%Y %H:%M:%S"))
        f.write('\n')
        f.write(';')
        f.write('\n')
        f.close()
        time.sleep(1)
        for i in range(0,3):
            blink(led)
        os.system('fswebcam ~/Desktop/Photos/%H%M%S.jpeg')
        time.sleep(3)

f1 = Thread(target = doorsensor())
f2 = Thread(target = cardreader())

f2.start()
f1.start()


gpio.cleanup()