from machine import Pin
from time import sleep
t=1
led = [3,4,5,6]

a=Pin(led[3],Pin.OUT)
b=Pin(led[2],Pin.OUT)
c=Pin(led[1],Pin.OUT)
d=Pin(led[0],Pin.OUT)

def zero():
    a.value(0)
    b.value(0)
    c.value(0)
    d.value(0)

def one():
    a.value(1)
    b.value(0)
    c.value(0)
    d.value(0)

def two():
    a.value(0)
    b.value(1)
    c.value(0)
    d.value(0)

def three():
    a.value(1)
    b.value(1)
    c.value(0)
    d.value(0)

def four():
    a.value(0)
    b.value(0)
    c.value(1)
    d.value(0)

def five():
    a.value(1)
    b.value(0)
    c.value(1)
    d.value(0)

def six():
    a.value(0)
    b.value(1)
    c.value(1)
    d.value(0)

def seven():
    a.value(1)
    b.value(1)
    c.value(1)
    d.value(0)

def eight():
    a.value(0)
    b.value(0)
    c.value(0)
    d.value(1)

def nine():
    a.value(1)
    b.value(0)
    c.value(0)
    d.value(1)

def ten():
    a.value(0)
    b.value(1)
    c.value(0)
    d.value(1)


def eleven():
    a.value(1)
    b.value(1)
    c.value(0)
    d.value(1)

def twelve():
    a.value(0)
    b.value(0)
    c.value(1)
    d.value(1)

def thirteen():
    a.value(1)
    b.value(0)
    c.value(1)
    d.value(1)

def fourteen():
    a.value(0)
    b.value(1)
    c.value(1)
    d.value(1)

def fifteen():
    a.value(1)
    b.value(1)
    c.value(1)
    d.value(1)

while True: 
    sleep(t)
    
    one()
    sleep(t)
    zero()
    sleep(0.2)

    two()
    sleep(t)
    zero()
    sleep(0.2)


    three()
    sleep(t)
    zero()
    sleep(0.2)


    four()
    sleep(t)
    zero()
    sleep(0.2)


    five()
    sleep(t)
    zero()
    sleep(0.2)


    six()
    sleep(t)
    zero()
    sleep(0.2)


    seven()
    sleep(t)
    zero()
    sleep(0.2)


    eight()
    sleep(t)
    zero()
    sleep(0.2)


    nine()
    sleep(t)
    zero()
    sleep(0.2)


    ten()
    sleep(t)
    zero()
    sleep(0.2)


    eleven()
    sleep(t)
    zero()
    sleep(0.2)


    twelve()
    sleep(t)
    zero()
    sleep(0.2)

    thirteen()
    sleep(t)
    zero()
    sleep(0.2)

    fourteen()
    sleep(t)
    zero()
    sleep(0.2)


    fifteen()
    sleep(t)
    zero()
    sleep(0.2)