const int redPin = 9;
const int greenPin = 10;
const int bluePin = 11;
const int buzzerPin = 12;
const int delayTime = 1000; // 1 second delay

void setup() {
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
}

void loop() {
  // Red
  digitalWrite(redPin, HIGH);
  digitalWrite(greenPin, LOW);
  digitalWrite(bluePin, LOW); 
  digitalWrite(buzzerPin, HIGH);
  delay(delayTime);

  // Green
  digitalWrite(redPin, LOW);
  digitalWrite(greenPin, HIGH);
  digitalWrite(bluePin, LOW);
  digitalWrite(buzzerPin, HIGH);
  delay(delayTime);

  // Blue
  digitalWrite(redPin, LOW);
  digitalWrite(greenPin, LOW);
  digitalWrite(bluePin, HIGH);
  digitalWrite(buzzerPin, HIGH);
  delay(delayTime);
}