import time, random, board, neopixel

def reihe (reihennummer, rot, gelb, grün):
    anfang = (reihennummer-1)*8
    i = 0
    while i<8:
        pixels[anfang + i] = (rot, gelb, grün)
        i = i + 1
    return

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=True)

reihe(3, 255, 0, 0)
reihe(6, 0, 255, 255)
reihe(8, 0, 255, 0)
reihe(1, 255, 0, 255)