#define RED_LED 14
#define FAN_RELAY 17

void setup() {
  pinMode(RED_LED, OUTPUT);
  pinMode(FAN_RELAY, OUTPUT);
}

void loop() {

  digitalWrite(RED_LED, HIGH);
  digitalWrite(FAN_RELAY, HIGH);
  delay(2000);

  digitalWrite(RED_LED, LOW);
  digitalWrite(FAN_RELAY, LOW);
  delay(2000);
}