#!/usr/bin/python
import time
# 2 main traffic light 3 ways to go per tf_light
# form traffic_light's name = {direction : status[status<1,0,-1> ,delay time<second>]}
traffic_light_1 = {
                    'Straight' : [None,None],
                    'Left' : [None,None],
                    'Right' : [None,None]
                    }
traffic_light_2 = {
                    'Straight' : [None,None],
                    'Left' : [None,None],
                    'Right' : [None,None],
                    }
#3 status Red, Yellow and Green don't miss anything
#time will add later except Yellow it alway has 3 seconds only
status = {  "Red":None,
            "Yellow": 3,
            "Green":None
        }

# Green --> Yellow -->  Red
# ^                      |
# |                      |
# ------------------------


def change_status(current_status): # use to change status
    if (current_status == 0):
        return 1
    elif (current_status == -1):
        return 0
    if (current_status == 1):
        return -1

def status_value(status): # use to print out the screen
    if status == 1:
        return "Green"
    elif status == 0:
        return "Red"
    if status == -1:
        return "Yellow"

def synchronize_2(status):# sychronize 2 traffic light so its can run smoothly
    if status == 1:
        return 0
    elif status == 0 :
        return 1
    if status == -1 :
        return 0
def synchronize_1(status):

devices = ['traffic_light_1' , 'traffic_light_2' ]


#setup first time :
traffic_light = input("Which one you want to set up <traffic_light_1 or traffic_light_2> : ")
if traffic_light in devices:
    if  traffic_light == "traffic_light_1":
        traffic_light_1["Straight"][0] = input("Update status for ", traffic_light," straight direction: ")
    else :