const int pirPin = 2;    
const int relayPin = 6;  
void setup() 
{
  pinMode(pirPin, INPUT);
  pinMode(relayPin, OUTPUT);
  digitalWrite(relayPin, LOW); 
  Serial.begin(9600);
}
void loop() 
{
  int pirState = digitalRead(pirPin);
  if (pirState == HIGH) {
    digitalWrite(relayPin, HIGH); 
    Serial.println("Motion detected!");
    delay(1000); 
  } else 
  {
    digitalWrite(relayPin, LOW);  
    Serial.println("NO Motion detected!");
    delay(1000);
  }

}