#define pinTbl 2
#define pinBzr 3
void setup() {
  pinMode(pinTbl, INPUT);
  pinMode(pinBzr, OUTPUT);
}

void loop() {
  int tblDitekan = digitalRead(pinTbl);
  if (tblDitekan==HIGH) {
    playTone(8000);
    playTone(2000);
  }
}
void playTone(int frekuensi) {
  long jeda = 1000000 / frekuensi / 2;
  for (int i=0; i<100; i++)
  digitalWrite(pinBzr, HIGH);
  delayMicroseconds(jeda);
  digitalWrite(pinBzr, LOW);
  delayMicroseconds(jeda);
}