#define RED_LED_PIN 15
#define GREEN_LED_PIN 2
#define BLUE_LED_PIN 0

void setup() {
  // put your setup code here, to run once:
  pinMode(RED_LED_PIN, OUTPUT);
  pinMode(GREEN_LED_PIN, OUTPUT);
  pinMode(BLUE_LED_PIN, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(RED_LED_PIN, HIGH);
  digitalWrite(GREEN_LED_PIN, HIGH);
  digitalWrite(BLUE_LED_PIN, HIGH);
  delay(10); // this speeds up the simulation
}