Fibonacci64 - Expanding Rainbows - CircuitPython & NeoPixel Library

code.py

# Fibonacci64 - Expanding Rainbows - CircuitPython & NeoPixel
# https://gist.github.com/jasoncoon/a70d24ed38994aa669f943c2e84512e4
# https://www.evilgeniuslabs.org/fibonacci64-micro

# This example uses CircuitPython and the Adafruit NeoPixel library
# You'll need neopixel.mpy in your /lib directory
# More information: https://learn.adafruit.com/welcome-to-circuitpython/circuitpython-libraries

import board
import neopixel
import time


pixel_pin = board.D10
num_pixels = 64

pixels = neopixel.NeoPixel(
    pixel_pin,
    num_pixels,
    brightness=0.0625,
    auto_write=False)

physicalToFibonacci = (
    0, 13, 26, 39, 52, 57, 44, 31,
    18, 5, 10, 23, 36, 49, 62, 54,
    41, 28, 15, 2, 7, 20, 33, 46,
    59, 51, 38, 25, 12, 4, 17, 30,
    43, 56, 61, 48, 35, 22, 9, 1,
    14, 27, 40, 53, 58, 45, 32, 19,
    6, 11, 24, 37, 50, 63, 55, 42,
    29, 16, 3, 8, 21, 34, 47, 60)

hue = 0


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 < 0 or pos > 255:
        return (0, 0, 0)
    if pos < 85:
        return (255 - pos * 3, pos * 3, 0)
    if pos < 170:
        pos -= 85
        return (0, 255 - pos * 3, pos * 3)
    pos -= 170
    return (pos * 3, 0, 255 - pos * 3)


def rainbow_wheel():
    global hue
    for i in range(num_pixels):
        h = (physicalToFibonacci[i] * 4 + hue) % 255
        pixels[i] = wheel(h)
    hue = (hue - 4) % 255


while True:
    rainbow_wheel()
    pixels.show()
    time.sleep(.04)