Trouble with basic blinking LED circuit with attached circuit and python code

Can you take a look at the attached circuit and code (below). It seems the green LED should blink but I'm not getting it to light up at all. Thoughts? Thanks so much!

Circuit:

Python code:

import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BOARD)

GPIO.setup(12, GPIO.OUT)
GPIO.output(12, GPIO.LOW)

try:
    while True:
        GPIO.output(12, GPIO.HIGH)
        print "should be on"
        time.sleep(1)
        GPIO.output(12, GPIO.LOW)
        print "should be off"
        time.sleep(1)

except KeyboardInterrupt: # If CTRL+C is pressed, exit cleanly:
    GPIO.cleanup() # cleanup all GPIO`