Audio Music Mix Pult (almost)

This week i tried to recreate music mix pult with the help of arduino. In the circuit there are 3 buttons, each corresponds to a certain  sound, pressing them with different duration you can get different sounds. Also i included micro servo thing, which can be managed by photo resister.

To make micro servo “play” i combined it with the metal straw, at the same time i took a knife to hit them to get interesting and clear sound. As a stick is really heavy comparing to the servo i placed it the table side.

Code:

#include "pitches.h"
#include<Servo.h>
int but1 = 13;
int but2 = 12;
int but3 = 11;
int sound = 9;
Servo servo; 
int i =0;
void setup() {
  pinMode(but1, INPUT);
  pinMode(but2, INPUT);
  pinMode(but3, INPUT);
    pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(sound, OUTPUT);

servo.attach(7);
   servo.write(180);
   Serial.begin(9600);
}

void loop() {
  int b1 = digitalRead(but1);
  int b2 = digitalRead(but2);
  int b3 = digitalRead(but3);
  int photoValue = analogRead(A1);
  int triggerInterval = map(photoValue, 0, 100, 0, 100);
 for ( i= 0; i<180; i++);{
   servo.write(i);
   delay(triggerInterval);
 }
  for ( i=180; i>=1; i--);{
   servo.write(i);
   delay(triggerInterval);
 }

  //Serial.println(triggerInterval);
if (b1 == 1){
tone (sound, NOTE_A3, 200);
    delay(100);
tone (sound, NOTE_A1, 100);
    delay(90);

tone (sound, NOTE_A3, 100);
    delay(80);

tone (sound, NOTE_A1, 100);
    delay(80);

}
if (b2 == 1){
   //digitalWrite(led2, HIGH);

tone (sound, NOTE_A3, 100);
    delay(100);
tone (sound, NOTE_A1, 100);
    delay(80);

tone (sound, NOTE_A3, 100);
    delay(100);

tone (sound, NOTE_A1, 500);
tone (sound, NOTE_A3, 500);
tone (sound, NOTE_A4, 500);
tone (sound, NOTE_A4, 500);

}

if (b3 == 1){
tone (sound, NOTE_A1, 500);
delay(80);
tone (sound, NOTE_A3, 500);
delay(80);
 
}
}