// LEDC Configuration
const int freq = 5000;           // PWM frequency
const int ledChannel1 = 0;       // LEDC channel for LED1
const int ledChannel2 = 1;       // LEDC channel for LED2
const int resolution = 8;        // PWM resolution (8 bits: values from 0 to 255)

// Pin assignments
const int ledPin1 = 16;          // Pin connected to LED1
const int ledPin2 = 17;          // Pin connected to LED2

void setup() {

  ledcAttach(ledPin1, freq, resolution);
  ledcAttach(ledPin2, freq, resolution);

}

void loop() {
  // Change brightness of LED1 (0 to 255)
  for (int dutyCycle = 0; dutyCycle <= 255; dutyCycle++) {
    ledcWrite(ledPin1, dutyCycle);
    delay(10);
  }

  // Change brightness of LED2 (255 to 0)
  for (int dutyCycle = 255; dutyCycle >= 0; dutyCycle--) {
    ledcWrite(ledPin2, dutyCycle);
    delay(10);
  }
}