#define LED_R 9
#define LED_G 10
#define LED_B 11
#define PIEZO 5

#define JOY_SEL A0
#define JOY_H A1
#define JOY_V A2
#define POT A3

void setup() {
  pinMode(JOY_H, INPUT);
  pinMode(JOY_V, INPUT);
  pinMode(JOY_SEL, INPUT_PULLUP);
  pinMode(LED_R, OUTPUT);
  pinMode(LED_G, OUTPUT);
  pinMode(LED_B, OUTPUT);
  pinMode(PIEZO, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  int joyH = analogRead(JOY_H);
  int joyV = analogRead(JOY_V);
  int joySel = analogRead(JOY_SEL);
  
  int pot = analogRead(POT);
  int intensity = map(pot, 0, 1023, 0, 255);

  int valH = map(joyH, 0, 1023, -1, 1);
  int valV = map(joyV, 0, 1023, -1, 1);

  analogWrite(LED_R, max(valH, 0) * intensity);
  analogWrite(LED_G, max(-valH, 0) * intensity);
  analogWrite(LED_B, max(valV, 0) * intensity);

  if (joySel == 0) {
    int frequency = map(pot, 0, 1023, 100, 8000);
    tone(PIEZO, frequency);
  } else {
    noTone(PIEZO);
  }

}