const int led =5;
const int pir =19;

void setup(){
  pinMode(led, OUTPUT);
  pinMode(pir, INPUT);
  Serial.begin(9600);

}

void loop(){
  const int ip=digitalRead(pir);
  Serial.println(ip);
  delay(100);
  if(ip==1){
  digitalWrite(led, HIGH);
  delay(1000);

}

else{
  digitalWrite(led, LOW);
  delay(1000);

}

}