#define ledPin 13 
#define pirPin 2
int pirState=LOW;
int val =0;
void setup() {
  // put your setup code here, to run once:
pinMode(ledPin, OUTPUD);
pinMode(pirPin, IMPUT);
Serial.begin(9600)
}
void loop() {
  // put your main code here, to run repeatedly:
val=digitalRead(pirPin);
if(val==HIGH)
 digitalWrite(ledPin, HIGH)
 if(pirState==LOW) {
   Serial.println("Movimiento detectado...!");
    pirState=HIGH
  }
}
else(
   digitalWrite(ledPin,LOW);
   if(pirState==HIGH){
      Serial.println("No hay movimiento");
      pirState=LOW;
    }
  }
}