// sensorValue = analogRead(sensorPin);

// Input pins
int potmeterPin = A0;
int presetPin = 2;
int huePin = 3;
// -
int potmeterValue = 0;
int presetPressed = 0;
int huePressed = 0;

// Output pins
int redPin = 9;
int greenPin = 10;
int bluePin = 11;
// -
int redValue = 255;
int greenValue = 0;
int blueValue = 0;

// Others vars
boolean demo = true;
int msdelay = 5; // Delay between changing colors

//-//-//-//-//-//

void demoMode() {
  while (blueValue < 255  && demo)
  {
      demoColorChange(bluePin, 1, 3);
  }
  while (redValue > 0 && demo)
  {
      demoColorChange(redPin, -1, 1);
  }
  while (greenValue < 255  && demo)
  {
      demoColorChange(greenPin, 1, 2);
  }
  while (blueValue > 0  && demo)
  {
      demoColorChange(bluePin, -1, 3);
  }
  while (redValue < 255  && demo)
  {
      demoColorChange(redPin, 1, 1);
  }
   while (greenValue > 0  && demo)
  {
      demoColorChange(greenPin, -1, 2);
  }
}

void demoColorChange(int pin, int plusmin, int color) {
  if (digitalRead(presetPin) == 0 && digitalRead(huePin) == 0) {
    if (color == 1)
    {
      analogWrite(pin, redValue);
      redValue += plusmin;
    }
    if (color == 2)
    {
      analogWrite(pin, greenValue);
      greenValue += plusmin;
    }
    if (color == 3)
    {
      analogWrite(pin, blueValue);
      blueValue += plusmin;
    }
    delay(msdelay);
  }
  else
  {
    demo = false;
  }
}

void setup() {
  pinMode(potmeterPin, INPUT);
  pinMode(presetPin, INPUT);
  pinMode(huePin, INPUT);
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
}
void loop() {
  if (demo)
    demoMode();
  else
  {
  }
}