// RGB LED PWM Fade - XIAO ESP32-S3
// Using D2, D3, D4 for R/G/B

const int RED_PIN = D2;
const int GREEN_PIN = D3;
const int BLUE_PIN = D4;

void setup() {
  ledcAttachPin(RED_PIN,   0);
  ledcAttachPin(GREEN_PIN, 1);
  ledcAttachPin(BLUE_PIN,  2);

  ledcSetup(0, 5000, 8);
  ledcSetup(1, 5000, 8);
  ledcSetup(2, 5000, 8);
}

void loop() {
  for (int i = 0; i < 255; i++) {
    ledcWrite(0, i);       // Red up
    ledcWrite(1, 255 - i); // Green down
    ledcWrite(2, i / 2);   // Blue half intensity
    delay(10);
  }

  for (int i = 255; i >= 0; i--) {
    ledcWrite(0, i);
    ledcWrite(1, 255 - i);
    ledcWrite(2, i / 2);
    delay(10);
  }
}