#define flame 2
#define relay 3
#define buzzer 4

void setup() {
  Serial.begin(9600);
  pinMode(flame, INPUT);
  pinMode(relay, OUTPUT);
  pinMode(buzzer, OUTPUT);

  digitalWrite(relay, HIGH);
}
void loop() {
  bool Svalue = digitalRead(flame);

  if (Svalue == 0) {
    digitalWrite(relay, LOW);
    digitalWrite(buzzer, HIGH);
    delay(300);
    digitalWrite(buzzer, LOW);
    delay(300);
    digitalWrite(buzzer, HIGH);
    delay(300);
    digitalWrite(buzzer, LOW);
    delay(300);
    digitalWrite(buzzer, HIGH);
    delay(300);
    digitalWrite(buzzer, LOW);
  } else {
    digitalWrite(relay, HIGH);
  }

}
NOCOMNCVCCGNDINLED1PWRRelay Module