from machine import Pin
import time

# Configure pins as output
led1 = Pin(5, Pin.OUT)
led2 = Pin(6, Pin.OUT)
led3 = Pin(7, Pin.OUT)

while True:
    # LED 1
    led1.value(1)
    time.sleep(1)
    led1.value(0)
    time.sleep(1)

    # LED 2
    led2.value(1)
    time.sleep(1)
    led2.value(0)
    time.sleep(1)

    # LED 3
    led3.value(1)
    time.sleep(1)
    led3.value(0)
    time.sleep(1)