const int redPin = 5;    // Red pin of the RGB LED
const int greenPin = 8;  // Green pin of the RGB LED
const int bluePin = 9;   // Blue pin of the RGB LED

void setup() {
  pinMode(redPin, OUTPUT);    // Initialize Red pin of the RGB LED as output
  pinMode(greenPin, OUTPUT);  // Initialize Green pin of the RGB LED as output
  pinMode(bluePin, OUTPUT);   // Initialize Blue pin of the RGB LED as output
}

void loop() {
  // Turn on red
  digitalWrite(redPin, LOW);
  digitalWrite(greenPin, HIGH);
  digitalWrite(bluePin, HIGH);
  delay(500); 

  // Turn on green
  digitalWrite(redPin, HIGH);
  digitalWrite(greenPin, LOW);
  digitalWrite(bluePin, HIGH);
  delay(500);

  // Turn on blue
  digitalWrite(redPin, HIGH);
  digitalWrite(greenPin, HIGH);
  digitalWrite(bluePin, LOW);
  delay(500);

  // Turn on yellow (red + green)
  digitalWrite(redPin, LOW);
  digitalWrite(greenPin, LOW);
  digitalWrite(bluePin, HIGH);
  delay(500);

  // Turn on cyan (green + blue)
  digitalWrite(redPin, HIGH);
  digitalWrite(greenPin, LOW);
  digitalWrite(bluePin, LOW);
  delay(500);

  // Turn on magenta (red + blue)
  digitalWrite(redPin, LOW);
  digitalWrite(greenPin, HIGH);
  digitalWrite(bluePin, LOW);
  delay(500);

  // Turn on white (red + green + blue)
  digitalWrite(redPin, LOW);
  digitalWrite(greenPin, LOW);
  digitalWrite(bluePin, LOW);
  delay(500);
}