pixel.py

import time
import board
from rainbowio import colorwheel
import neopixel

PIN = board.D18  # This is the default pin on the 5x5 NeoPixel Grid BFF.


NUMPIXELS = 10  # Update this to match the number of LEDs.
SPEED = 0.0015  # Increase to slow down the rainbow. Decrease to speed it up.
BRIGHTNESS = 0.2  # A number between 0.0 and 1.0, where 0.0 is off, and 1.0 is max.

pixels = neopixel.NeoPixel(PIN, NUMPIXELS, brightness=BRIGHTNESS, auto_write=False)


def rainbow_cycle(wait):
    for color in range(255):
        for pixel in range(len(pixels)):  # pylint: disable=consider-using-enumerate
            pixel_index = (pixel * 256 // len(pixels)) + color * 5
            pixels[pixel] = colorwheel(pixel_index & 255)
        pixels.show()
        
        time.sleep(wait)

while True:
    rainbow_cycle(SPEED)