// Define the pin numbers for the LEDs and the motion sensor
#define LED1 4
#define LED2 5
#define PIR_SENSOR 2

void setup() {
  // Set the LED pins as output
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  
  // Set the motion sensor pin as input
  pinMode(PIR_SENSOR, INPUT);
}

void loop() {
  // Read the state of the motion sensor
  int motionState = digitalRead(PIR_SENSOR);
  
  if (motionState == HIGH) {
    // Motion detected
    digitalWrite(LED1, HIGH); // Turn LED1 on (connects to 5V)
    digitalWrite(LED2, LOW);  // Turn LED2 off (connects to GND)
  } else {
    // No motion detected
    digitalWrite(LED1, LOW);  // Turn LED1 off (connects to GND)
    digitalWrite(LED2, HIGH); // Turn LED2 on (connects to 5V)
  }
  
  delay(100); // Small delay to prevent rapid switching
}