// Define the pin for the LED
const int ledPin = 26;

void setup() {
  // Set the LED pin as an output
  pinMode(ledPin, OUTPUT);
}

void loop() {
  // Dim to Bright
  for (int brightness = 0; brightness <= 255; brightness++) {
    analogWrite(ledPin, brightness); // Set the brightness
    delay(10); // Small delay for smooth fading
  }

  // Bright to Dim
  for (int brightness = 255; brightness >= 0; brightness--) {
    analogWrite(ledPin, brightness); // Set the brightness
    delay(10); // Small delay for smooth fading
  }
}