import time
import machine 
import random 

pins=[6,7,8,9,10,11,12,13,14,15]
leds=[]
for pin_number in pins:
    led=machine.Pin(pin_number,machine.Pin.OUT)
    leds.append(led)

def pattern_alternate():
    for i in range(10):
        leds[i].value (i%2)

patterns =[pattern_alternate]

while True:
    for pattern in patterns:
        pattern()
        time.sleep(1)