Arduino Motion Detection Light

1int irmotionPin = 4; // Pin of IR Motion 
2Sensorint relayPin = 8; //  Pin of Relay Module
3void setup(){ Serial.begin(9600);
4pinMode(relayPin, OUTPUT);  // Set Pin connected to Relay as an OUTPUT 
5digitalWrite(relayPin, LOW); // Set  Pin to LOW to turn Relay OFF
6}
7void loop(){
8  while (digitalRead(irmotionPin)  == HIGH)
9  { // If Motion detected
10  
11  digitalWrite(relayPin, HIGH); //  Turn Relay ON
12  Serial.println("Relay is ON"); 
13  delay(15000);}
14  digitalWrite(relayPin,  LOW); // Turn Relay OFF 
15  Serial.println("Relay is OFF"); 
16  delay(500);  }