from machine import Pin
from time import sleep

a=Pin(0,Pin.OUT)
b=Pin(1,Pin.OUT)
c=Pin(2,Pin.OUT)
d=Pin(3,Pin.OUT)
e=Pin(4,Pin.OUT)
f=Pin(5,Pin.OUT)
g=Pin(6,Pin.OUT)
h=Pin(7,Pin.OUT)
i=Pin(8,Pin.OUT)
j=Pin(9,Pin.OUT)

while(1):
    a.on()
    sleep(0.1)
    a.off()

    b.on()
    sleep(0.1)
    b.off()

    c.on()
    sleep(0.1)
    c.off()

    d.on()
    sleep(0.1)
    d.off()

    e.on()
    sleep(0.1)
    e.off()

    f.on()
    sleep(0.1)
    f.off()

    g.on()
    sleep(0.1)
    g.off()

    h.on()
    sleep(0.1)
    h.off()

    i.on()
    sleep(0.1)
    i.off()
    
    j.on()
    sleep(0.1)
    j.off()