# from machine import Pin
# import time
# ds=Pin(5,Pin.OUT)
# latch=Pin(4,Pin.OUT)
# shift=Pin(2,Pin.OUT)

# ds.value(0)
# shift.off()
# shift.on()
from machine import Pin
import time

ds = Pin(5, Pin.OUT)
latch = Pin(4, Pin.OUT)
shift = Pin(2, Pin.OUT)

# led_states = [1, 0, 1, 0, 1, 0, 1, 0] 

# data_to_send = 0
# for i in range(8):
#     if led_states[i]:
#         data_to_send |= (1 << i)

# for i in range(7, -1, -1):  
  
#     bit = (data_to_send >> i) & 0x01
   
#     ds.value(bit)
   
#     shift.off()
#     shift.on()
#     time.sleep_ms(500)

# latch.off()
# latch.on()

while 1:
  ds.value(1)
  shift.off()
  shift.on() 

  latch.off()
  latch.on()
  time.sleep_ms(600)
  
  ds.value(1)
  shift.off()
  shift.on() 

  latch.off()
  latch.on()
  time.sleep_ms(600)