import time, board, neopixel

WAIT = 0.1
BRIGHTNESS = 1
LED_PIN = board.GP0

MATRIX_WIDTH = 8
MATRIX_HEIGHT = 8

num_pixels = MATRIX_WIDTH * MATRIX_HEIGHT
pixels = neopixel.NeoPixel(LED_PIN, num_pixels, brightness=BRIGHTNESS, auto_write=False)

while True:
    pixels.fill((255, 0, 0))
    pixels.show()

    time.sleep(WAIT)

    pixels.fill((0, 255, 0))
    pixels.show()

    time.sleep(WAIT)

    pixels.fill((0, 0, 255))
    pixels.show()

    time.sleep(WAIT)