rpi_control_board.py

import RPi.GPIO as GPIO
import time

LED_PINS = (31, 33, 35, 37)
BUTTON_PIN = 29

GPIO.setmode(GPIO.BOARD)  # use board pin numbering

for i in LED_PINS:
    GPIO.setup(i, GPIO.OUT)

GPIO.setup(BUTTON_PIN, GPIO.IN)

while True:
    input_state = GPIO.input(BUTTON_PIN)
    if input_state == False:
        for i in range(3):
            for i in LED_PINS:
	        GPIO.output(i, True)  # turn on GPIO pin
                time.sleep(0.1)
            for i in LED_PINS:
                GPIO.output(i, False)  # turn off GPIO pin
                time.sleep(0.1)