from machine import Pin,Timer
import time 
import random

led1=Pin(0,Pin.OUT)
led2=Pin(2,Pin.OUT)
led3=Pin(4,Pin.OUT)
led4=Pin(5,Pin.OUT)
led5=Pin(6,Pin.OUT)
led6=Pin(7,Pin.OUT)
led7=Pin(8,Pin.OUT)
led8=Pin(9,Pin.OUT)

'''
n=251
if  n>=0 and n<=255:
    x=n%2
    n=n//2
    y=n%2
    n=n//2
    z=n%2
    n=n//2
    a=n%2
    n=n//2
    b=n%2
    n=n//2
    c=n%2
    n=n//2
    d=n%2
    n=n//2
    e=n%2
    
    if x==1:
        led1.on()
    if y==1:
        led2.on()
    if z==1:
        led3.on()
    if a==1:
        led4.on()
    if b==1:
        led5.on()
    if c==1:
        led6.on()
    if d==1:
        led7.on()
    if e==1:
        led8.on()
'''


'''

while True:
    a=random.randint(1,8)
    time.sleep(0.5)
    if a==1:
        led1.on() 
        led2.off()
        led3.off()
        led4.off()
        led5.off()
        led6.off()
        led7.off()
        led8.off()
        
        

    if a==2:
        led1.off()
        led2.on()
        led3.off()
        led4.off()
        led5.off()
        led6.off()
        led7.off()
        led8.off()
    if a==3:
        led1.off()
        led2.off()
        led3.on()
        led4.off()
        led5.off()
        led6.off()
        led7.off()
        led8.off()
    if a==4:
        led1.off()
        led2.off()
        led3.off()
        led4.on()
        led5.off()
        led6.off()
        led7.off()
        led8.off() 
    if a==5:
        led1.off()
        led2.off()
        led3.off()
        led4.off()
        led5.on()
        led6.off()
        led7.off()
        led8.off()
        
    if a==6:
        led1.off()
        led2.off()
        led3.off()
        led4.off()
        led5.off()
        led6.on()
        led7.off()
        led8.off()
    if a==7:
        led1.off()
        led2.off()
        led3.off()
        led4.off()
        led5.off()
        led6.off()
        led7.on()
        led8.off()
    if a==8:
        led1.on() 
        led2.off()
        led3.off()
        led4.off()
        led5.off()
        led6.off()
        led7.off()
        led8.on()
'''

while True:
 t=0.15
 for n1 in range (1,9):
    if n1==1:
        led1.on() 
        time.sleep(t)
        led1.off()
        time.sleep(t)
       
    
    if n1==2:
        led2.on() 
        time.sleep(t)
        led2.off()
        time.sleep(t)
        
    if n1==3:
        led3.on() 
        time.sleep(t)
        led3.off()
        time.sleep(t)
        
    if n1==4:
        led4.on() 
        time.sleep(t)
        led4.off()
        time.sleep(t)

    if n1==5:
        led5.on() 
        time.sleep(t)
        led5.off()
        time.sleep(t)
        
    if n1==6:
        led6.on() 
        time.sleep(t)
        led6.off()
        time.sleep(t)
    if n1==7:
        led7.on() 
        time.sleep(t)
        led7.off()
        time.sleep(t)

    if n1==8:
        led8.on() 
        time.sleep(t)
        led8.off()
        time.sleep(t)



 for n2 in reversed(range (1,9)):
        if n2==1:
            led1.on() 
            time.sleep(t)
            led1.off()
            time.sleep(t)
        
        
        if n2==2:
            led2.on() 
            time.sleep(t)
            led2.off()
            time.sleep(t)
            
        if n2==3:
            led3.on() 
            time.sleep(t)
            led3.off()
            time.sleep(t)
            
        if n2==4:
            led4.on() 
            time.sleep(t)
            led4.off()
            time.sleep(t)

        if n2==5:
            led5.on() 
            time.sleep(t)
            led5.off()
            time.sleep(t)
            
        if n2==6:
            led6.on() 
            time.sleep(t)
            led6.off()
            time.sleep(t)

        if n2==7:
            led7.on() 
            time.sleep(t)
            led7.off()
            time.sleep(t)

        if n2==8:
            led8.on() 
            time.sleep(t)
            led8.off()
            time.sleep(t)