TASK: Your task is to: (1) connect LEDs and resistors to the RPi3 with GPIO pins 12 (Red), 16 (Yellows) and 21 (Green), using a breadboard. You should connect LEDs positive sides (anode) to GPIO pins and LEDs negative sides (cathode) to one ends of resistors. The other ends of resistors should be connected to GND. (2) Develop a python program to simulate traffic lights. This needs to implement one sequence of blinking LEDs as follows:

RED ON indicating stop (1 second)

RED ON, YELLOW on indicating attention (1 second)

GREEN ON indicating go (1 second)

PAUSE (3 seconds)

GREEN ON, YELLOW blinking indicating attention (3 times)

RED ON indicating stop (1 second)

Use time.sleep() method to hold and blink the LEDs. Use while loop to repeat the sequence.