#define led 13
#define button 2
#define buzzer 8
#define pot1 A0
#define pot2 A1

bool on = false;

void setup() {
  pinMode(led, OUTPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(button, INPUT_PULLUP);
}

void loop() {

  if (digitalRead(button) == LOW) {
    on = !on;
    delay(300);
  }

  if (on == true) {

    digitalWrite(led, HIGH);

    int v = analogRead(pot1);
    int sound = map(v, 0, 1023, 0, 255);

    int p = analogRead(pot2);
    int d;

    if (p < 341) {
      d = 1000;
    } else if (p < 682) {
      d = 300;
    } else {
      d = 27; 
    }

    analogWrite(buzzer, sound);
    delay(d);
    analogWrite(buzzer, 0);
    delay(d);

  } else {
    digitalWrite(led, LOW);
    digitalWrite(buzzer, LOW);
  }
}