#define pir 8
#define led 10
void setup() {
  Serial.begin(9600);
  pinMode(pir, INPUT);
  pinMode(led, OUTPUT);
}

void loop() {
if (digitalRead(pir) == LOW){
  digitalWrite(led, LOW);
}
if (digitalRead(pir)== HIGH){
  Serial.println("Alarme acionado!");
  digitalWrite(led, HIGH);
  delay(5000);
}
}