const int Pin[12] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,13};
const int Pot[12] = {A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11};
int value[12];
const int funcion = 48;

void setup() {
  // set pins 2 through 13 as outputs:
  Serial.begin(57600);
  for(int i=0; i<12; i++) pinMode(Pin[i], OUTPUT);
  pinMode(funcion, INPUT);
  digitalWrite(funcion, HIGH);
}

void loop()
  {
    if (digitalRead(funcion))
      {
       Serial.println("Independiente");
       for(int i=0; i<12; i++)
        {
          value[i] = map(analogRead(Pot[i]),0,1023,0,255);
          analogWrite(Pin[i], value[i]);
        }
      }
     else
      {
        Serial.println("Grupo");
        value[0] = map(analogRead(Pot[0]),0,1023,0,255);
        for(int i=0; i<12; i++) analogWrite(Pin[i], value[0]);
      }

  }