from machine import Pin, PWM
from time import sleep

#pin configuration

led = Pin(18, Pin.OUT)
led1 = Pin(19, Pin.OUT)
led2 = Pin(20, Pin.OUT)



def ledBlink(a):
    a.on()
    sleep(0.5)
    a.off()
    sleep(0.5)

def buzzerFunc():
    buzzer = PWM(Pin(13))
    buzzer.freq(500)
    buzzer.duty_u16(1000)
    sleep(0.5)
    buzzer.duty_u16(0)
    

while True:
    ledBlink(led)
    ledBlink(led1)
    buzzerFunc()
    ledBlink(led2)
    






# from machine import Pin
# from time import sleep

# #pin configuration

# led = Pin(18, Pin.OUT)
# led1 = Pin(19, Pin.OUT)
# led2 = Pin(20, Pin.OUT)

#while True:
  # led.on()
  # sleep(0.5)
  # led.off()
  # sleep(0.5)

  # led1.on()
  # sleep(0.5)
  # led1.off()
  # sleep(0.5)

  # led2.on()
  # sleep(0.5)
  # led2.off()
  # sleep(0.5)