return 0;

  }

  double red,blue,green;

  double white = colorRead(taosOutPin,0,1);

  red = white/colorRead(taosOutPin,1,1);

  blue = white/colorRead(taosOutPin,2,1);

  green = white/colorRead(taosOutPin,3,1);

  Serial.print("red");

  Serial.println(red);

  Serial.print("blue");

  Serial.println(blue);

  Serial.print("green");

  Serial.println(green);

  if(red > blue && red > green){

      Coeff = 255 / red;

      Ro = 255;

      Go = green * Coeff;

      Bo = blue * Coeff;

      LED_RGB(Ro, Go, Bo);

      return 1;

    }

  if(blue > green && blue > red){

      Coeff = 255 / blue;

      Bo = 255;

      Go = green * Coeff;

      Ro = red * Coeff;

      LED_RGB(Ro, Go, Bo);

      return 2;

  }

  if(green > blue && green > red){

      Coeff = 255 / green;

      Go = 255;

      Ro = red * Coeff;

      Bo = blue * Coeff;

      LED_RGB(Ro, Go, Bo);

      return 3;

    }

}

double colorRead(int taosOutPin, int color, boolean LEDstate){

  //make sure that the pin is set to input 

  pinMode(taosOutPin, INPUT);

    taosMode(1);

  int sensorDelay = 3;

  //set pins to trigger filters

  if(color == 0){// bianco (no filtri)

    digitalWrite(S3, LOW); //S3

    digitalWrite(S2, HIGH); //S2

    //Serial.print(" w");

  }else if(color == 1){// red filter

    digitalWrite(S3, LOW); //S3

    digitalWrite(S2, LOW); //S2

    //Serial.print(" r");

  }else if(color == 2){// blue filter

    digitalWrite(S3, HIGH); //S3

    digitalWrite(S2, LOW); //S2

    //Serial.print(" b");

  }else if(color == 3){// green filter

    digitalWrite(S3, HIGH); //S3

    digitalWrite(S2, HIGH); //S2

    //Serial.print(" g");

  }

  double readPulse;

  if(LEDstate == 0){

    taosMode(0);    

//    digitalWrite(LED, LOW);

  }

  if(LEDstate == 1){

  taosMode(1);

//      digitalWrite(LED, HIGH);

  }

  delay(sensorDelay);

  readPulse = pulseIn(taosOutPin, LOW, 80000);

  // pulse timeout read setting

  if(readPulse < .1){

     readPulse = 80000;

  }

  // turn off sensor led

  taosMode(0);

  return readPulse;

}

// manages the frequency output mode TaosMode(0);

// sero, sensor quiet