'''
Defining a Function
Pixels1_functions
Possible solution
'''
from codex import *
from time import sleep

delay = 1

def turn_red():
    color = RED
    pixels.set(0, color)
    pixels.set(1, color)
    pixels.set(2, color)
    pixels.set(3, color)
    sleep(delay)

def turn_yellow():
    color = YELLOW
    pixels.set(0, color)
    pixels.set(1, color)
    pixels.set(2, color)
    pixels.set(3, color)
    sleep(delay)

# Main program
turn_red()
turn_yellow()
turn_red()
turn_yellow()