import time, random, 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))
    i = random.randint(0, 63)
    pixels[i] = (255, 255, 0)
    pixels.show()

    #time.sleep(WAIT)
    pixels[i] = (0, 0, 0)
    pixels.show()