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Make a Color-Changing Silhouette Light

Onboard NeoPixels:
Change colors

import board
import neopixel
from time import sleep

RED = (255, 0, 0)
GREEN = (0, 255, 0)
BLUE = (0, 0, 255)
PURPLE = (128, 0, 128)

NUM_LEDS = 10
PIXEL_PIN = board.D8

np = neopixel.NeoPixel(PIXEL_PIN, NUM_LEDS)

while True:
    np.fill(RED)
    sleep(0.5)
    np.fill(GREEN)
    sleep(0.5)
    np.fill(BLUE)
    sleep(0.5)
    np.fill(PURPLE)
    sleep(0.5)