Arduino flame detector with alarms and automatic fire extinguishing

1//Arduino Flame Detector
2
3 int relayPin = 5;
4 int buzzerPin = 2;
5 int flamePin = 8;
6 int TONE1 = 900;     // First tone frequency
7 int TONE2 = 1200;    // Second tone frequency
8 int DURATION = 500;  // Duration of each tone in milliseconds
9 int blueled = 3;
10 int redled = 4;
11 int Flame = HIGH;
12
13void setup() 
14{
15  Serial.begin(9600);
16  pinMode(buzzerPin, OUTPUT);
17  pinMode(relayPin, OUTPUT);
18  pinMode(redled, OUTPUT);
19  pinMode(blueled, OUTPUT);
20  digitalWrite(redled, LOW);
21  digitalWrite(blueled, LOW);
22  digitalWrite(relayPin, LOW);
23  pinMode(flamePin, INPUT);
24  
25}
26
27void loop() 
28{
29  Flame = digitalRead(flamePin);
30  if (Flame == LOW)
31  {
32     digitalWrite(buzzerPin, LOW);
33     digitalWrite(redled, LOW);
34     digitalWrite(blueled, LOW);
35     digitalWrite(relayPin, LOW);
36     noTone(buzzerPin);
37  }
38    
39  else
40  {
41    digitalWrite(relayPin, HIGH);
42    tone(buzzerPin, TONE1);
43    digitalWrite(redled, HIGH);
44    digitalWrite(blueled, LOW);
45    delay(DURATION);
46    tone(buzzerPin, TONE2);
47    digitalWrite(redled, LOW);
48    digitalWrite(blueled, HIGH);
49    delay(DURATION);
50  }
51}