new_contents: #Import Libraries
  import time             #A collection of time related commands
  import RPi.GPIO as GPIO #The GPIO commands
  
  #Set the GPIO pin naming mode
  GPIO.setmode(GPIO.BCM)
  GPIO.setwarnings(False)
  
  #Set pins 18, 23 and 24 to be output
  GPIO.setup(18,GPIO.OUT)
  GPIO.setup(23,GPIO.OUT)
  GPIO.setup(24,GPIO.OUT)
  
  #Turn LEDs on
  GPIO.output(18,GPIO.HIGH)
  GPIO.output(23,GPIO.HIGH)
  GPIO.output(24,GPIO.HIGH)
  
  time.sleep(1) #Pause for 1 second
  
  #Turn LEDs off
  GPIO.output(18,GPIO.LOW)
  GPIO.output(23,GPIO.LOW)
  GPIO.output(24,GPIO.LOW)
  
  time.sleep(1) #Pause for 1 second
  
  #Turn LEDs on
  GPIO.output(18,GPIO.HIGH)
  GPIO.output(23,GPIO.HIGH)
  GPIO.output(24,GPIO.HIGH)
  
  time.sleep(1) #Pause for 1 second
  
  #Turn LEDs off
  GPIO.output(18,GPIO.LOW)
  GPIO.output(23,GPIO.LOW)
  GPIO.output(24,GPIO.LOW)
  
  #Clean up the GPIO pins
  GPIO.cleanup()
  
subject: Create 3-blink.py