# Test three leds connected to Raspberry Pi Gpio.

ledtest.py

#!/usr/bin/env python
# Test three leds connected to Raspberry Pi Gpio. 
import RPi.GPIO as GPIO
from time import sleep
# Setup Gpio
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)        # Use actual pin numbers on the board
GPIO.setup(32, GPIO.OUT)
GPIO.setup(36, GPIO.OUT)
GPIO.setup(38, GPIO.OUT)

GPIO.output(32, 1)
sleep(1)
GPIO.output(36, 1)
sleep(1)
GPIO.output(38, 1)
sleep(1)
GPIO.output(38, 0)
sleep(1)
GPIO.output(36, 0)
sleep(1)
GPIO.output(32, 0)
sleep(1)