int buzzer=5;
int poten=A0;
int hays=0;

void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(buzzer, OUTPUT);
pinMode(poten, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
hays = analogRead(poten);
tone(buzzer, hays);

Serial.println(hays);
}