int led=12;
int sensor=6;
 void setup() {
  pinMode(led, OUTPUT);
  pinMode(sensor, INPUT);
  Serial.begin(9600);
 }
 void loop() {
  int value=digitalRead(sensor);
  Serial.println(value);
  if(value==HIGH)
  {
    digitalWrite(led, HIGH);
    Serial.println("Motion is detected");
  }
  else
  {
    digitalWrite(led, LOW);
    Serial.println("Motion is not detected");
  }
 }