// Initialize LED pins
int redPin = 9;
int greenPin = 10;
int bluePin = 11;

void setup() {
  // Set LED pins as output
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
}

void loop() {
  // Start with red at 20%, green at 20%, and blue at 100%
  analogWrite(redPin, 51; // 20% of 255
  analogWrite(greenPin, 51); // 20% of 255
  analogWrite(bluePin, 255); // 100% of 255

  // Fade blue LED from 100 to 50
  for (int brightness = 255; brightness >= 50; brightness--) {
    analogWrite(bluePin, brightness);
    delay(100);
  }

  // Fade green LED from 20 to 50
  for (int brightness = 51; brightness <= 127; brightness++) {
    analogWrite(greenPin, brightness);
    delay(10);
  }

  // Fade blue from 50 to 20
  for (int brightness = 127; brightness >= 51; brightness--) {
    analogWrite(bluePin, brightness);
    delay(10);
  }

  // Fade red from 20 to 50
  for (int brightness = 51; brightness <= 127; brightness++) {
    analogWrite(redPin, brightness);
    delay(10);
  }

  // Fade blue from 20 to 50
  for (int brightness = 127; brightness <= 255; brightness++) {
    analogWrite(bluePin, brightness);
    delay(10);
  }

  // Fade green from 50 to 20
  for (int brightness = 127; brightness >= 51; brightness--) {
    analogWrite(greenPin, brightness);
    delay(10);
  }

  // Fade red from 50 to 20
  for (int brightness = 127; brightness >= 51; brightness--) {
    analogWrite(redPin, brightness);
    delay(10);
  }

  // Fade blue from 50 to 100
  for (int brightness = 127; brightness <= 255; brightness++) {
    analogWrite(bluePin, brightness);
    delay(10);
  }
}