const int ledPin = D7; // LED connected to digital pin D7

void setup() {
  pinMode(ledPin, OUTPUT); // Initialize D7 as an output
  Serial.begin(9600);
}

void loop() {
  digitalWrite(ledPin, HIGH); // Turn the LED ON
  Serial.println("LED ON");
  delay(1000);                // Wait for 1 second
  digitalWrite(ledPin, LOW);  // Turn the LED OFF
  Serial.println("LED OFF");
  delay(2000);                // Wait for 2 seconds
}