from machine import pin
from time import sleep

flame_sensor=Pin(16,Pin.IN)
buzzer = Pin(17,Pin.OUT)
utime.sleep(0.5)

buzzer.high()

In1=Pin(1,Pin.OUT)
In2=Pin(0,Pin.OUT)
EN_A=PWM(Pin(2))

EN_A.freq(1500)

duty_cycle=65535

while True:
    while flame sensor.value() == 1:
        print("FLAME DETECTED")

        buzzer.low()
        In1.low()
        In2.high()
        EN_A.DUTY-u16(int(duty-cycle/2))


    if flame-sensor.valuee() == 0:

        buzzer.high()
        In1.low()
        In2.low()
        print("NO FLAME DETECTED") 
    UTIME.SLEEP(0.2)