int IRSensor=9;
int LED=13;
void setup() {
 Serial.begin(115200);
Serial.println("Serial working");
 pinMode(IRSensor, INPUT);
 pinMode(LED, OUTPUT);
}

void loop() {
 int sensorstatus=digitalRead(IRSensor);
 if(sensorstatus==1) 
 {
 digitalWrite(LED, LOW);
 Serial.println("Motion ended!");
 delay(2000);
 }
  digitalWrite(LED, HIGH);
  Serial.println("motion detected");
  delay(2000);
}