from machine import Pin
from time import sleep
from random import randint

relay1 = 15
relay2 = 14
relay3 = 13
relaypin1 = Pin(relay1, Pin.OUT)
relaypin2 = Pin(relay2, Pin.OUT)
relaypin3 = Pin(relay3, Pin.OUT)

time = 2

while True:
    rand = randint(2,3)
    print("random value = %d"%rand)
    if rand == 2:
      for i in range(2):
            relaypin1.value(0)
            sleep(time)
            relaypin1.value(1)
            sleep(time)
            relaypin1.value(0)
      for i in range(2):
            relaypin2.value(0)
            sleep(time)
            relaypin2.value(1)
            sleep(time)
            relaypin2.value(0)
    else:
      for i in range(3):
            relaypin1.value(0)
            sleep(time)
            relaypin1.value(1)
            sleep(time)
            relaypin1.value(0)
      for i in range(3):
            relaypin3.value(0)
            sleep(time)
            relaypin3.value(1)
            sleep(time)
            relaypin3.value(0)