void setup() {
  // put your setup code here, to run once:
 pinMode(A0, OUTPUT);
 pinMode(A1, INPUT_PULLUP);
 pinMode(0, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  if (digitalRead(A1)==LOW)
    {
     tone(8, 262, 250);
      digitalWrite(A0, HIGH);}
  else
{  
      digitalWrite(A0, LOW);
}
     
    delay(1);

}