const int redPin = 11;
const int greenPin = 10;
const int bluePin = 9;

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

void loop() {
  setColor(255, 0, 0);
  delay(2000);

  setColor(0, 255, 0);
  delay(2000);

  setColor(0, 0, 255);
  delay(2000);
}

void setColor(int R, int G, int B) {
  analogWrite(redPin, R);
  analogWrite(greenPin, G);
  analogWrite(bluePin, B);  
}