// Define LED pins
  const int led1 = D0;       // LED connected to digital pin 6 on XIAO-ESP32 C3,  
  const int led2 = D7;      // LED connected to digital pin 7 on XIAO-ESP32 C3, 
  void setup() {
       // Initialize the LED pins as outputs:
      pinMode(led1, OUTPUT);
      pinMode(led2, OUTPUT);
        }
    
   void loop() {
      //blinking two LEDs
      digitalWrite(led1, HIGH);
      digitalWrite(led2, LOW);
      delay(1000);
      digitalWrite(led1, LOW);
      digitalWrite(led2, HIGH);
      delay(1000); 
        }