#define Buzz 23
#define Button_Pin 32

hw_timer_t *Buzz_timer = NULL;

int i=1;
double multi = 0.5;

// This is the Timer ISR. It is automatically called
// on a timer alarm event.
void IRAM_ATTR onTimer() {
  digitalWrite(Buzz, !digitalRead(Buzz));
}

void IRAM_ATTR IO_INT_ISR(){

  

    if(i==5) i=1;
    else i++;
    
    if(i==1){
      multi = 1;
    Serial.println("super slow");
    }
    else if(i==2){
      multi = 0.75 ;
      Serial.println("slow");
    }
    else if(i==3){
      multi = 0.5;
      Serial.println("medium");
    }
    else if(i==4){
      multi = 0.25;
      Serial.println("fast");
    }
    else if(i==5){
      multi = 0.125;
      Serial.println("super fast");
    }

  }


void playnote(double hz,int duration,int stop_timer){
  
  timerAlarmWrite(Buzz_timer, ((1.0 / hz) * 1000000.0) / 2.0 , true);        // set alarm every 1 sec
  timerAlarmEnable(Buzz_timer);                      // enable the alarm
  delay(duration * multi);
  timerAlarmDisable(Buzz_timer);
  digitalWrite(Buzz, LOW);
  delay(stop_timer * multi);

}

void setup() {
  Serial.begin(9600);
  pinMode(Buzz, OUTPUT);
  Buzz_timer = timerBegin(0, 80, true);              // use tiemr 0 and set prescale to 80 so 1 tick is 1 uSec
  timerAttachInterrupt(Buzz_timer, &onTimer, true);  // point to the ISR

  pinMode(Button_Pin, INPUT);
  attachInterrupt(Button_Pin, IO_INT_ISR, RISING);

  
  playnote(2093,1500,0);
  playnote(1976,500,0);
  playnote(1760,500,0);
  playnote(1568,1000,0);
  playnote(1397,2000,0);

  playnote(1568,500,0);
  playnote(1760,1000,0);

  playnote(2093,1000,0);
  playnote(1976,1500,0);
  playnote(1760,500,0);
  playnote(1568,500,0);
  playnote(1397,1000,0);
  playnote(1319,4250,0);

  playnote(1760,1500,0);
  playnote(1568,500,0);
  playnote(1397,500,0);
  playnote(1319,1000,0);
  playnote(1175,2000,0);

  playnote(1319,500,0);
  playnote(1397,1000,0);

  playnote(1760,1000,0);
  playnote(1661,1500,0);
  playnote(1397,500,0);
  playnote(1319,500,0);
  playnote(1175,1000,0);
  playnote(1047,4000,0);

  playnote(1109,500,0);
  playnote(1175,500,0);
  playnote(1760,500,500);
  playnote(1760,4000,0);

  playnote(2093,1500,0);
  playnote(1976,1000,0);
  playnote(1568,7500,0);

  playnote(987.8,500,0);
  playnote(1047,500,0);
  playnote(1397,500,500);
  playnote(1397,4000,0);

  playnote(1760,1000,0);
  playnote(1568,1000,0);
  playnote(1397,1500,0);
  playnote(1319,4500,0);

  playnote(2093,1500,0);
  playnote(1976,500,0);
  playnote(1760,500,0);
  playnote(1568,1000,0);
  playnote(1397,2000,0);

  playnote(1568,500,0);
  playnote(1760,1000,0);

  playnote(2093,1000,0);
  playnote(1976,1500,0);
  playnote(1760,500,0);
  playnote(1568,500,0);
  playnote(1397,1000,0);
  playnote(1319,4250,0);

  playnote(1760,1500,0);
  playnote(1568,500,0);
  playnote(1397,500,0);
  playnote(1319,1000,0);
  playnote(1175,2000,0);

  playnote(1319,500,0);
  playnote(1397,1000,0);

  playnote(1760,1000,0);
  playnote(1661,1500,0);
  playnote(1397,500,0);
  playnote(1319,500,0);
  playnote(1175,1000,0);
  playnote(1047,4000,0);

  playnote(1109,500,0);
  playnote(1175,500,0);
  playnote(1760,500,500);
  playnote(1760,4000,0);

  playnote(2093,1500,0);
  playnote(1976,1000,0);
  playnote(1568,7500,0);

  playnote(987.8,500,0);
  playnote(1047,500,0);
  playnote(1397,500,500);
  playnote(1397,4000,0);


   playnote(2093,1000,0);
   playnote(1976,1000,0);
   playnote(2093,4000,0);

}


void loop() {
}