int n;

void setup() {
  // put your setup code here, to run once:
  pinMode(6, INPUT);
  pinMode(2, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  n= digitalRead(6);
  if (n == 0)
  {
    Serial.println("No motion");
    digitalWrite(2, 0);
    delay(1000);
  }
  if (n == 1)
  {
    Serial.println("Motion Detected");
    digitalWrite(2, 1);
    delay(1000);
  }
}