#define pir1 11
#define pir2 13

void setup() {
  pinMode(2, OUTPUT);    // Output for pir1
  pinMode(3, OUTPUT);    // Output for pir2
  pinMode(pir1, INPUT);  // PIR sensor 1
  pinMode(pir2, INPUT);  // PIR sensor 2
  pinMode(5, OUTPUT);    // Standby ON
  pinMode(9, OUTPUT);    // Activated blinking
}

void loop() {
  if (digitalRead(pir1) == HIGH || digitalRead(pir2) == HIGH) {
    // Motion detected
    if (digitalRead(pir1) == HIGH) {
      digitalWrite(2, HIGH);
      digitalWrite(5, HIGH);
      delay(10);
    } else {
      digitalWrite(2, LOW);
    }

    if (digitalRead(pir2) == HIGH) {
      digitalWrite(3, HIGH);
      digitalWrite(5, HIGH);
      delay(10);
    } else {
      digitalWrite(3, LOW);
    }

    digitalWrite(9, LOW); // Stop standby blinking
  } 
  else {
    standby();  // Call standby function correctly with semicolon
    digitalWrite(2, LOW);
    digitalWrite(3, LOW);
    digitalWrite(5, LOW); // Turn off standby light
  }
}

void standby() {
  digitalWrite(9, HIGH);
  delay(140);
  digitalWrite(9, LOW);
  delay(140);
}