from machine import Pin
from time import sleep

led1 = Pin(0, Pin.OUT)
led2 = Pin(1, Pin.OUT)
led3 = Pin(2, Pin.OUT)
led4 = Pin(3, Pin.OUT)
led5 = Pin(4, Pin.OUT)
led6 = Pin(5, Pin.OUT)
led7 = Pin(6, Pin.OUT)
led8 = Pin(7, Pin.OUT)

leds = [led1, led2, led3, led4, led5, led6, led7, led8]
delay_time = 0.15
repetitions = 4

def pattern1():
    for i in range(8):
        leds[i].on()  
        sleep(delay_time)
    
    
    for i in range(7, -1, -1):
        leds[i].off()  
        sleep(delay_time)

def pattern2():
    for i in range(4):
        leds[i].on()  
        leds[7 - i].on()  
        sleep(delay_time)
    
    for i in range(3, -1, -1):
        leds[i].off()  
        leds[7 - i].off()  
        sleep(delay_time)

def main():
    for _ in range(repetitions):
        pattern1()
        sleep(0.5)  
        pattern2()
        sleep(0.5)

main()