from machine import Pin
from neopixel import NeoPixel  
import utime
pixels = NeoPixel(Pin(16), 16) # branché en GP16, comporte 16 LEDS
while True:
    pixels[0] = (255, 0, 0) 
    pixels.write() 
    utime.sleep(1)
    pixels[10] = (0, 255, 0) 
    pixels.write() 
    utime.sleep(1)
    pixels.fill((0, 0, 255)) 
    pixels.write() 
    utime.sleep(1)
    pixels.fill((0, 0, 0))
    pixels.write() 
    utime.sleep(1)