#define LED2 2  // Using GPIO2 for this example
#define LED4 4  // Using GPIO2 for this example
#define LED15 15  // Using GPIO2 for this example

void setup() {
  pinMode(LED2, OUTPUT);  // Set LED_PIN as OUTPUT
  pinMode(LED4, OUTPUT);  // Set LED_PIN as OUTPUT
  pinMode(LED15, OUTPUT);  // Set LED_PIN as OUTPUT
}

void loop() {
  // Light Blue Led
  digitalWrite(LED2, HIGH);   // Turn the LED on

  // Pink Led
  digitalWrite(LED15, HIGH);   // Turn the LED on
  delay(500);                                     // Wait for a second

  digitalWrite(LED2, LOW);    // Turn the LED off        
  digitalWrite(LED15, LOW);    // Turn the LED off
  delay(500);                                     // Wait for a second

  // Orange Led
  digitalWrite(LED4, HIGH);   // Turn the LED on
  delay(500);                                     // Wait for a second
  digitalWrite(LED4, LOW);    // Turn the LED off
  delay(500);                                     // Wait for a second
  

  
  
}