const int ledR = 3;
const int ledG = 5;
const int ledB = 6;

const int inputR = A0;
const int inputG = A1;
const int inputB = A2;

void setup() {
  pinMode(ledR, OUTPUT);
  pinMode(ledG, OUTPUT);
  pinMode(ledB, OUTPUT);
  pinMode(inputR, INPUT);
  pinMode(inputG, INPUT);
  pinMode(inputB, INPUT);
}

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

void loop() {
  analogWrite(ledR, readPot(inputR));
  analogWrite(ledG, readPot(inputG));
  analogWrite(ledB, readPot(inputB));
}