from machine import Pin
from utime import sleep

dot = 0.25
dash = 1
gap = 0.2
gap_1 = 0.5 # gap between two letters
gap_w = 2 # gap between two words

def dot():
    led1.on()
    sleep(0.25)
    led1.off()
    sleep(0.2)

def dash():
    led1.on()
    sleep(1)
    led1.off()
    sleep(0.2)

def gap_l():
    sleep(0.5)

def gap_w():
    sleep(2)

led1 = Pin(13, Pin.OUT)

while True:
    dot()
    dot()
    dot()
    print("S")
    gap_l()
    dash()
    dash()
    dash()
    print("O")
    gap_l()