"Hourglass" on the raspberry pi pico using circuitpython

circuitpython version 7.0.0

Components used:

1. Raspberry Pi Pico
2. ADXL345 accelerometer
3. MAX 7219 based dot matrix displays

This project was based on : https://github.com/adafruit/Adafruit_Learning_System_Guides/tree/main/CircuitPython_LED_Sand_Hourglass modified to run on the pi pico with max7219 based dot matrix displays

Libraries needed on the pico (circuitpython - https://circuitpython.org/libraries) :

1. adafruit_bus_device
2. adafruit_max7219
3. adafruit_adxl34x
4. adafruit_framebuf