from machine import Pin
import utime
led = Pin(2,Pin.OUT)
led1 = Pin(7,Pin.OUT)
led2 = Pin(12,Pin.OUT)

while True:
    led.value(1)
    led1.value(0)
    led2.value(0)
    utime.sleep(1)
    led.value(0)
    led1.value(1)
    led2.value(0)
    utime.sleep(1)
    led.value(0)
    led1.value(0)
    led2.value(1)
    utime.sleep(1)