Once you've finished setting up your Circuit Playground Bluefruit with CircuitPython and its required libraries, you can add these additional libraries to the lib folder of the Circuit Playground's CIRCUITPY drive which should appear when the board is plugged into your computer via USB. Copy these folders:

  • adafruit_display_shapes
  • adafruit_imageload

To the CIRCUITPY flash drive /lib directory (create the directory if it doesn't exist).

Then, you can click on the Download: Project Zip link in the window below to download the two bitmaps, .wav file and code.py file.

# SPDX-FileCopyrightText: 2021 Liz Clark for Adafruit Industries
# SPDX-License-Identifier: MIT

import time
import displayio
from adafruit_circuitplayground import cp
import adafruit_imageload
from adafruit_gizmo import tft_gizmo
from adafruit_display_shapes.circle import Circle

#  setup for the Gizmo TFT
display = tft_gizmo.TFT_Gizmo()

#  loading the background image
bg_bitmap, bg_palette = adafruit_imageload.load(
    "/clouds_bg.bmp", bitmap=displayio.Bitmap, palette=displayio.Palette
bg_grid = displayio.TileGrid(bg_bitmap, pixel_shader=bg_palette)

#  loading the crescent moon bitmap sequence
bitmap, palette = adafruit_imageload.load(
    "/moon_anime.bmp", bitmap=displayio.Bitmap, palette=displayio.Palette
#  makes the black background transparent so we only see the cresent moon

tile_grid = displayio.TileGrid(

#  two circles for the center "jewel"
jewel_outline = Circle(x0=120, y0=120, r=40, fill=0xFBF236)
jewel = Circle(x0=120, y0=120, r=35, fill=0xF70570)

#  adding the two jewel circle elements to a group
jewel_splash = displayio.Group()

#  making a group for the crescent moon sequence
#  scale is 2 because at full 240x240 resolution image is too big
moon_group = displayio.Group(scale=2)
#  group to hold all of the display elements
main_group = displayio.Group()

#  adding the crescent moon tile grid to the moon group
#  adding the background to the main group
#  adding the moon group to the main group
#  adding the jewel circles to the main group

#  showing the main group on the display

#  tracks the tilegrid index location for the crescent moon
moon = 0
#  holds time.monotonic()
crescent = 0
#  a button debouncing
a_pressed = False
#  b button debouncing
b_pressed = False
#  tracks if music is playing
music_playing = False
#  tracks if animation is paused
animation_pause = False

while True:
    #  button debouncing
    if not cp.button_a and a_pressed:
        a_pressed = False
    if not cp.button_b and b_pressed:
        b_pressed = False
    #  runs crescent moon animation
    if not music_playing and not animation_pause:
        #  every .8 seconds...
        if (crescent + 0.8) < time.monotonic():
            #  the moon animation cycles
            tile_grid[0] = moon
            #  moon is the tilegrid index location
            moon += 1
            #  resets timer
            crescent = time.monotonic()
            #  resets tilegrid index
            if moon > 35:
                moon = 0
    #  if music is NOT playing and you press the a button...
    if not music_playing and (cp.button_a and not a_pressed):
        #  music begins playing and will loop
        music_playing = True
        a_pressed = True
        print("music playing")
        #  song plays once
        #  music_playing state is updated
        music_playing = False
    #  if the animation IS playing and you press the b button...
    if not animation_pause and (cp.button_b and not b_pressed):
        #  the animation pauses by updating the animation_pause state
        animation_pause = True
        b_pressed = True
        #  debugging REPL message
        print("animation paused")
    #  if the animation is PAUSED and you press the b button...
    if animation_pause and (cp.button_b and not b_pressed):
        #  the animation begins again by updating the animation_pause state
        animation_pause = False
        b_pressed = True
        #  debugging REPL message
        print("animation running again")


Make sure you've followed these steps:

  • Loaded all the required library files and directories into the CIRCUITPY /lib directory
  • Copied code.py to the main (root) directory of the CIRCUITPY drive
  • Copied the two bitmap images (moon_anime.bmp and clouds_bg.bmp) to the main (root) directory of the CIRCUITPY drive
  • Copied the audio file (moonlight_densetsu.wav) to the main (root) directory of the CIRCUITPY drive

Your Circuit Playground Bluefruit CIRCUITPY drive should look like this after you load the libraries, two bitmaps, audio file and code.py file:

This guide was first published on Apr 06, 2021. It was last updated on 2021-04-06 16:43:45 -0400.

This page (Code the Sailor Moon Star Locket) was last updated on May 13, 2022.

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