Fading LED

#include <CtrlLed.h> // The pin of the board's built-in LED. Some boards (e.g. the ESP32 Dev Module)// don't define LED_BUILTIN, so pin 2 is used there. Change it to match your wiring.#ifdef LED_BUILTINconst uint8_t LED_PIN = LED_BUILTIN;#elseconst uint8_t LED_PIN = 2;#endif // PWM mode example (PWM-capable pin with brightness control):// This assumes you have connected your LED to a pin with PWM capabilities:// The maximum brightness (second parameter) can be used to calibrate an LED,// in case you are using multiple LEDs that have different maximum brightness.CtrlLed led(LED_PIN, 50); void setup(){  // Turn on the LED and set the brightness to 0%.  led.turnOn();  led.setBrightness(0);} void loop() {  // Fade LED brightness from 0 to 100.  for (uint8_t brightness = 0; brightness < 100; brightness++) {    led.setBrightness(brightness);    delay(10); // Adjust the delay time to change the transition speed.  }   // Fade LED brightness from 100 to 0.  for (uint8_t brightness = 100; brightness > 0; brightness--) {    led.setBrightness(brightness);    delay(10); // Adjust the delay time to change the transition speed.  }}