////////////////////// Door Sensor Interval
unsigned long prevMillis  = 0;
const    long interval    = 15000; // for fan 15 Second
int flag = 0;

int t1 = 10;
int t2 = 2;
#define motor 3
int Buzzer = 4;
int LED = 5;
int IRSensor = 2;
bool IRValue = HIGH;

void setup() {
  pinMode(LED, OUTPUT);
  pinMode(IRSensor, INPUT);
  pinMode(motor, OUTPUT);
  pinMode(Buzzer, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  IRValue = digitalRead(IRSensor);
  if (IRValue == LOW )
  {
    blinkLED(2);
    if (flag == 0) {
      Serial.println("Object is detected!");
      prevMillis  = millis();
      flag = 1;
    }
    /*
      blinkLED(2);
      delay(1000 * t1);
      Serial.println("Object is detected!");
      digitalWrite(LED, HIGH);
      digitalWrite(motor, HIGH);
      digitalWrite(Buzzer, HIGH);
      delay(1000 * t2);
    */
  }
  if (flag) {
    if (millis() - prevMillis >= interval) {
      digitalWrite(LED, HIGH);
      digitalWrite(motor, HIGH);
      digitalWrite(Buzzer, HIGH);
      delay(1000 * t2);
      flag = 0;
    }
  }
  else {
    Serial.println("No Found");
    digitalWrite(LED, LOW);
    digitalWrite(motor, LOW);
    digitalWrite(Buzzer, LOW);
  }
  //delay(200);
}

void blinkLED(int i) {
  for (int j = 0; j < i; j++) {
    digitalWrite(LED, HIGH);
    delay(100);
    digitalWrite(LED, LOW);
    delay(100);

  }
}