from machine import Pin
import time
import random

pin = Pin(5, Pin.OUT)
pin.value(1) 

while True:
    
    active_delay = random.randint(5, 15)  
    time.sleep(active_delay) 

   
    num_off_cycles = random.randint(1, 3) 
    for _ in range(num_off_cycles):
        pin.value(0) 
        time.sleep(random.uniform(0.1, 0.2)) 
        pin.value(1)
        time.sleep(random.uniform(0.1, 0.2))  

    pin.value(1)