//Arduino Flame Sensor

 int relayPin = 5;
 int buzzerPin = 2;
 int flamePin = 8;
 int TONE1 = 900;     // First tone frequency
 int TONE2 = 1200;    // Second tone frequency
 int DURATION = 500;  // Duration of each tone in milliseconds
 int blueled = 3;
 int redled = 4;
 int Flame = HIGH;

void setup() 
{
  Serial.begin(9600);
  pinMode(buzzerPin, OUTPUT);
  pinMode(relayPin, OUTPUT);
  pinMode(redled, OUTPUT);
  pinMode(blueled, OUTPUT);
  digitalWrite(redled, LOW);
  digitalWrite(blueled, LOW);
  digitalWrite(relayPin, LOW);
  pinMode(flamePin, INPUT);
  
}

void loop() 
{
  Flame = digitalRead(flamePin);
  if (Flame == LOW)
  {
     digitalWrite(buzzerPin, LOW);
     digitalWrite(redled, LOW);
     digitalWrite(blueled, LOW);
     digitalWrite(relayPin, LOW);
     noTone(buzzerPin);
  }
    
  else
  {
    digitalWrite(relayPin, HIGH);
    tone(buzzerPin, TONE1);
    digitalWrite(redled, HIGH);
    digitalWrite(blueled, LOW);
    delay(DURATION);
    tone(buzzerPin, TONE2);
    digitalWrite(redled, LOW);
    digitalWrite(blueled, HIGH);
    delay(DURATION);
  }
}