from machine import Pin,PWM # to continue use a pin
from time import sleep # sleep method is in time library


#configure pin

led = Pin(18, Pin.OUT) # pin 18 is connected to led out
led1 = Pin(19, Pin.OUT) # pin 19 is connected to led out
led2 = Pin(20, Pin.OUT) # pin 19 is connected to led out


#define the functiom



def buzzerOn():
  buzzer = PWM(Pin(22)) 
  buzzer.freq(500)
  buzzer.duty_u16(1000)
  sleep(1)
  buzzer.duty_u16(0)
  

def ledBlink(a):
  a.on()
  sleep(0.5) #on for 0.5s
  a.off()
  sleep(0.5)  #off for 0.5s

#loop

while True: 
  ledBlink(led) #18 pin
  ledBlink(led1)#19 pin
  buzzerOn()
  ledBlink(led2) #20 pin
  ledBlink(led1)#19 pin
   
  # led.on()
  # sleep(0.1)
  # led.off()
  # sleep(0.1)

  # led1.on()
  # sleep(0.1)
  # led1.off()
  # sleep(0.1)

  # led2.on()
  # sleep(0.1)
  # led2.off()
  # sleep(0.1)