#define PR A0 n puerto analogo (A0)
#define PG A1
#define PB A2
int rojo = 11;
int verde = 10;
int azul = 9;


void setup ()
{

  pinMode (rojo, OUTPUT);
  pinMode (verde, OUTPUT);
  pinMode (azul, OUTPUT);

  pinMode (PR, INPUT);
  pinMode (PG, INPUT);
  pinMode (PB, INPUT);
  Serial.begin (9600);
}

void loop ()
{
  int R = analogRead(PR);
  int i = map(R,0,1023,0,255);

  int G = analogRead(PG);
  int i1 = map(G,0,1023,0,255);

  int B = analogRead(PB);
  int i2 = map(B,0,1023,0,255);

  analogWrite (azul,i2);
  analogWrite (rojo,i);
  analogWrite (verde,i1);

 }