This is one of the example codes for FireFighterFan.

DetecsandGo.ino

int DCMOTOR = 4;
int PWM_SPEED = 100;
int SPEED_MOTOR = 150;
boolean fire = false;



void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);

  // DC MOTOR
  pinMode(DCMOTOR, OUTPUT);

  // FLAME SENSORS
  pinMode(5, INPUT); //FS_RIGHT
  pinMode(6, INPUT); //FS_CENTER
  pinMode(7, INPUT); //FS_LEFT

  //MOTOR PINS
  pinMode(8, OUTPUT); //dirmotor1
  pinMode(9, OUTPUT); //spdmotor1
  pinMode(10, OUTPUT);     //spdmotor2
  pinMode(11, OUTPUT);     //dirmotor2
}

void loop() {
  // put your main code here, to run repeatedly:
  int FLAME_RIGHT = digitalRead(5);
  int FLAME_CENTER = digitalRead(6);
  int FLAME_LEFT = digitalRead(7);

  if (FLAME_RIGHT == 0 ||  FLAME_LEFT == 0)
  {
    fire = true;
  }
  while (fire == true) {
    PUT_OFF_FIRE();
  }
  delay(10);
}


void PUT_OFF_FIRE() {
  int FLAME_RIGHT = digitalRead(5);
  int FLAME_CENTER = digitalRead(6);
  int FLAME_LEFT = digitalRead(7);
  if (FLAME_CENTER == 0) {
    FORWARD();
    delay(500);

  }
  else if (FLAME_RIGHT == 0) {
    TURN_RIGHT();
    delay(500);

  }
  else  if (FLAME_LEFT == 0) {

    TURN_LEFT();
    delay(500);

  }
  STOP();
  delay(1000);
  //  digitalWrite(RELAY_DC, HIGH);
  digitalWrite(DCMOTOR, HIGH);
  delay(5000);
  digitalWrite(DCMOTOR, LOW);
  delay(1000);

  fire = false;
}


void FORWARD() {
  digitalWrite(8, HIGH);
  analogWrite(9, SPEED_MOTOR);
  analogWrite(10, SPEED_MOTOR);
  digitalWrite(11, HIGH);
}
void TURN_RIGHT() {
  digitalWrite(8, HIGH);
  analogWrite(9, SPEED_MOTOR);
  analogWrite(10, SPEED_MOTOR);
  digitalWrite(11, LOW);
}
void TURN_LEFT() {
  digitalWrite(8, LOW);
  analogWrite(9, SPEED_MOTOR);
  analogWrite(10, SPEED_MOTOR);
  digitalWrite(11, HIGH);
}
void STOP() {
  //digitalWrite(8, HIGH);
  analogWrite(9, 0);
  analogWrite(10, 0);
  //digitalWrite(11, HIGH);
}