// Pin waar de LED is aangesloten
const int ledPin = 9;

void setup() {
   pinMode(ledPin, OUTPUT); // Zet de LED pin als output
}

void loop() {
  // Verhoog de helderheid van de LED
  for (int brightness = 0; brightness <= 255; brightness++) {
    analogWrite(ledPin, brightness);
    delay(10); // Wacht 10 ms
  }

  // Verlaag de helderheid van de LED
  for (int brightness = 255; brightness >= 0; brightness--) {
    analogWrite(ledPin, brightness);
    delay(10); // Wacht 10 ms
  }
}