from machine import Pin
from neopixel import NeoPixel
from time import sleep
from random import randrange
led_max = 16
led_max2 = 16
led_max3 = 16
pixels = NeoPixel(Pin(21), led_max)          # Pin 14; 16 LEDs
pixels2 = NeoPixel(Pin(5), led_max2)         # Pin 14; 16 LEDs
pixels3 = NeoPixel(Pin(4), 16)              # Pin 14; 16 LEDs
while True: 
  for i in range(16):
   
    rot = randrange(0,256,10)       # genearte randpnm numbers from 0 to 255 with 10 as step
    gruen = randrange(0,256,16)    
    blau = randrange(0,256,16)
 # Write those randonm numbers on the LEDs positions.  
    pixels[i]=[rot,gruen,blau]
    pixels2[i]=[rot,gruen,blau]
    pixels3[i]=[rot,gruen,blau]
  pixels.write()  # in die for-Anweisung einrücken
  pixels2.write()
  pixels3.write()
  sleep(0.1)      #