Sketch - Project 6 Starter kit modified V1(non funziona)

int sensorValue;
int sensorLow = 1023;
int sensorHigh = 0;

const int ledPin = 13;
const int buttonPin = 2;

int run = 0;

void setup(){
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, HIGH);

  while (millis() < 5000) {
    sensorValue = analogRead(A0);

    if (sensorValue > sensorHigh) {
      sensorHigh = sensorValue;
    }
    if (sensorValue < sensorLow) {
      sensorLow = sensorValue;
    }
  }

  digitalWrite(ledPin, LOW);
}

void loop() {
  if (digitalRead(buttonPin)) {
      if (run == 0){run = 1;}
      else {run = 0;}
  }
  if (run){
    sensorValue = analogRead(A0);

    int pitch = map(sensorValue, sensorLow, sensorHigh, 50, 4000);
    tone(8, pitch, 20);

    delay(10);
  }
}