// GPIO LED
#define RedLEDPin 4
#define GreenLEDPin 14

void setup() {
  Serial.begin(115200);
  // set the GPIOs
  pinMode(RedLEDPin, OUTPUT);
  pinMode(GreenLEDPin, OUTPUT);
}

void loop() {
  // Blink both LEDs together
  digitalWrite(RedLEDPin, HIGH);
  digitalWrite(GreenLEDPin, HIGH);
  delay(1000);
  digitalWrite(RedLEDPin, LOW);
  digitalWrite(GreenLEDPin, LOW);
  delay(1000);
}