int value = 0;
void setup() {
pinMode(11, INPUT_PULLUP);
pinMode(10, INPUT_PULLUP);
pinMode(9, INPUT_PULLUP);
pinMode(8, INPUT_PULLUP);
pinMode(12, OUTPUT);
}
void loop() {
tone(12, value);
if(digitalRead(11)==LOW){
delay(100);
value = 500;
}
if(digitalRead(10)==LOW){
delay(100);
value = 1000;
}
if(digitalRead(9)==LOW){
delay(100);
value = 1500;
}
if(digitalRead(8)==LOW){
delay(100);
value = 2000;
}
}