const int R_LED_PIN = 11;
const int G_LED_PIN = 10;
const int B_LED_PIN =  9;

int readPot(int pin) {
  return map(analogRead(pin), 0, 1023, 0, 255);
}

void setup() {
  Serial.begin(115200);
  pinMode(R_LED_PIN, OUTPUT);
  pinMode(G_LED_PIN, OUTPUT);
  pinMode(B_LED_PIN, OUTPUT);
}

void loop() {
  analogWrite(R_LED_PIN, readPot(A2));
  analogWrite(G_LED_PIN, readPot(A1));
  analogWrite(B_LED_PIN, readPot(A0));
}