void setup() {
  Serial.begin(115200);
  Serial.println("");
  Serial.println("Hello, XIAO ESP32-C3!");

  pinMode(D0, OUTPUT);
  pinMode(D1, OUTPUT);
  pinMode(D2, OUTPUT);
 
}

void loop() {

  Serial.println("Red");
  analogWrite(D0, 255);
  delay(500);
  analogWrite(D0, 0);

  Serial.println("Green");
  analogWrite(D1, 255);
  delay(500);
  analogWrite(D1, 0);

  Serial.println("Blue");
  analogWrite(D2, 255);
  delay(500);
  analogWrite(D2, 0);

}