int tekan;

void setup() {
  // put your setup code here, to run once:
pinMode(13, INPUT);
pinMode(12, INPUT);
pinMode(11, INPUT);
pinMode(10, INPUT);
pinMode(9, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
int tombol=digitalRead(13);
if (tombol==1){
  tekan++;
  delay(200);
  if(tekan==1){
    digitalWrite(12, HIGH);
    tone(1,262,500);
}
else if (tekan==2){
  digitalWrite(11, LOW);
  tone(1,262,500);
}
else if (tekan==3){
  digitalWrite(12, HIGH);
  digitalWrite(11, HIGH);
  tone(1,262,500);
}
else if (tekan==4){
  digitalWrite(10, HIGH);
  digitalWrite(9, LOW);
  tone(1,262,500);
}
else if (tekan==5){
  digitalWrite(9, HIGH);
  digitalWrite(10, LOW);
  tone(1,262,500);
   (tekan==0);
}

}
}