int pin = 12;
void setup() {
  // put your setup code here, to run once:
  pinMode(pin, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int value = analogRead(A0);

  digitalWrite(pin, HIGH);
  tone(pin, value);
  delay(value);
  digitalWrite(pin, LOW);

  Serial.println(value);
}