Circuit Playground Express Sleep Assistant for Toddlers ( https://www.adafruit.com/product/3333 )

viola_sleep_assistant.py

# a fun sleep assistant for toddlers adapting to life in a "big bed"
# when the circuit playground express lights up, it's OK to get up.
# if the playground is not yet lit up, please let the parent(s) sleep just a 
# little longer...
import time

import audioio
import board
from digitalio import DigitalInOut, Direction, Pull
import neopixel


button_a = DigitalInOut(board.BUTTON_A)
button_a.direction = Direction.INPUT
button_a.pull = Pull.DOWN

button_b = DigitalInOut(board.BUTTON_B)
button_b.direction = Direction.INPUT
button_b.pull = Pull.DOWN

spkrenable = DigitalInOut(board.SPEAKER_ENABLE)
spkrenable.direction = Direction.OUTPUT
spkrenable.value = True

speaker = audioio.AudioOut(board.A0)

pixels = neopixel.NeoPixel(board.NEOPIXEL, 10, brightness=0.01)
pixels.fill((0, 0, 0))
pixels.show()


def wheel(pos):
    # Input a value 0 to 255 to get a color value.
    # The colours are a transition r - g - b - back to r.
    if pos < 85:
        return (int(pos * 3), int(255 - (pos * 3)), 0)
    elif pos < 170:
        pos -= 85
        return (int(255 - (pos * 3)), 0, int(pos * 3))
    else:
        pos -= 170
        return (0, int(pos * 3), int(255 - pos * 3))


def rainbow_cycle(wait):
    for j in range(255):
        for i in range(len(pixels)):
            idx = int((i * 256 / len(pixels)) + j * 10)
            pixels[i] = wheel(idx & 255)
        pixels.show()
        time.sleep(wait)


while True:
    # Button A triggers "Prepare the (sleep) environment!"
    if button_a.value:
        rainbow_cycle(.001)
        pixels.fill((0, 0, 0))
        pixels.show()
        # sleep for 12 hours, then show purple neopixel ring
        time.sleep(12 * 60 * 60)
        # the purple neopixels means it's OK to get up and start the day!
        pixels.fill((255, 0, 255))
        pixels.show()
    # Button B resets the environment after a sleep cycle has completed
    elif button_b.value:
        pixels.fill((0, 0, 0))
        pixels.show()

    time.sleep(0.5)