const int relayPin = 22; // Define the GPIO pin connected to the relay control input

void setup() {
  pinMode(relayPin, OUTPUT);
}

void loop() {
  // Turn on the relay and the LED
  digitalWrite(relayPin, HIGH);
  delay(1000); // Wait for 1 second
  // Turn off the relay and the LED
  digitalWrite(relayPin, LOW);
  delay(1000); // Wait for 1 second
}