int button_state = 0;
void setup() {
  pinMode(22, OUTPUT);
  pinMode(33,OUTPUT);
  pinMode(4, INPUT_PULLUP);
}

void loop() {
 int button_state = digitalRead(4);
 if(button_state== LOW)
 {
  tone(2,1,1);
 }
 else 
 {
  tone(0,1,1);
 }
}