#define FLAME_SENSOR1 A0
#define FLAME_SENSOR2 A1
#define FLAME_SENSOR3 A2

#define RELAY_PIN 8



void setup() {

  pinMode(RELAY_PIN, OUTPUT);



  digitalWrite(RELAY_PIN, LOW);

  Serial.begin(9600);
}

void loop() {
  int flame1 = analogRead(FLAME_SENSOR1);
  int flame2 = analogRead(FLAME_SENSOR2);
  int flame3 = analogRead(FLAME_SENSOR3);

  if(flame1 < 500 || flame2 < 500 || flame3 < 500){
    digitalWrite(RELAY_PIN, HIGH);
    delay(3000);
    digitalWrite(RELAY_PIN, LOW);
   
  }

}