from machine  import Pin
import utime

led1 = Pin(16, Pin.OUT)
led2 = Pin(18, Pin.OUT)

def short_blink():
    led1.value(1)
    utime.sleep(0.3)
    led1.value(0)
    utime.sleep(0.5)
    led1.value(1)
    utime.sleep(0.3)
    led1.value(0)
    utime.sleep(0.5)
    led1.value(1)
    utime.sleep(0.3)
    led1.value(0)
    utime.sleep(0.5)

def long_blink():
    led2.value(1)
    utime.sleep(0.9)
    led2.value(0)
    utime.sleep(0.5)
    led2.value(1)
    utime.sleep(0.9)
    led2.value(0)
    utime.sleep(0.5)
    led2.value(1)
    utime.sleep(0.9)
    led2.value(0)
    utime.sleep(0.5)


while True:
    short_blink() #s
    long_blink() #o
    short_blink() #s
    utime.sleep(3)