from machine import Pin
from utime import sleep, sleep_ms

led1 = Pin(25, Pin.OUT)
led2 = Pin(32, Pin.OUT)
led3 = Pin(27, Pin.OUT)

while True:
    led3.on()
    led1.off()
    led2.off()
    sleep(2)
    led3.off()
    led1.on()
    led2.off()
    sleep(1)
    led3.off()
    led1.off()
    led2.on()
    sleep(2)