#define PIR_PIN 2    // PIR sensor output pin
#define LED_PIN 3    // LED output pin

unsigned long previousMillis = 0;
bool ledState = false;

void setup() {
  pinMode(PIR_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  int motionDetected = digitalRead(PIR_PIN);

  if (motionDetected == HIGH) {
    digitalWrite(LED_PIN, HIGH);
    ledState = true;
    previousMillis = millis();  // Record current time
    Serial.println("Motion Detected! Light ON");
  }

  // Check if 5 seconds passed after last motion
  if (ledState && millis() - previousMillis >= 5000) {
    digitalWrite(LED_PIN, LOW);
    ledState = false;
    Serial.println("5 seconds passed. Light OFF");
  }

  delay(100); // Short delay for stability
}