const int redPin = A0;
const int greenPin = A1;
const int bluePin = A2;

const int speakerPin = 2;

void setup() {
  Serial.begin(9600);
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);

    pinMode(speakerPin, OUTPUT);

}

void loop() {
  
  if (Serial.available() > 0) {
    char command = Serial.read();
    if (command == 'C') {
      int red = Serial.parseInt();
      int green = Serial.parseInt();
      int blue = Serial.parseInt();
      analogWrite(redPin, red);
      analogWrite(greenPin, green);
      analogWrite(bluePin, blue);
    } 
}