from machine import Pin
import time

led = [4,5,6,7,10,11,12,13]
leds = [Pin(pin,Pin.OUT) for pin in led]
#print(leds)
def Led(n):
    for i in range(len(led)):
        leds[i].value(1 if i < n else 0)
while 1:
    for x in range(1,8,1):
        Led(x)
        print(x,end="")
        time.sleep(0.5)

    for x in range(8,-1,-1):
        Led(x)
        print(x,end="")
        time.sleep(0.5)
    print()