import time
from my74HC595 import Chip74HC595
from machine import Pin

comPin=[47,35,36,21]
num =[0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xf8,
      0x80, 0x90, 0x88, 0x83, 0xc6, 0xa1, 0x86, 0x8e]

def led_display():
    for i in range(0,4):
        chns=Pin(comPin[i],Pin.OUT)
        chns.value(1)
        chip.shiftOut(0,num[i])
        time.sleep_ms(1)
        chns.value(0)
        chip.shiftOut(0,0xff)
       
  
#Pin(38)-74hc595.ds, Pin(39)-74hc595.st_cp, Pin(40)-74hc595.sh_cp
chip = Chip74HC595(38,39,40)
try:
    while True:
        led_display()
except:
    pass