const int buttonPin = 9; // Pin connected to the button
int variable1 = 100;
int variable2 = 200;
int Vol;
bool setVariable1 = true;

void setup() {
  // Initialize the button pin as an input
  pinMode(buttonPin, INPUT_PULLUP);

  // Initialize Serial communication
  Serial.begin(9600);

  // Set Vol to the initial value of variable1
  Vol = variable1;
}

void loop() {
  // Check if the button is pressed
  if (digitalRead(buttonPin) == LOW) {
    // Debounce delay
    delay(50);
    if (digitalRead(buttonPin) == LOW) {
      // Toggle between variable1 and variable2
      setVariable1 = !setVariable1;
      
      // Set Vol to the appropriate variable value
      if (setVariable1) {
        Vol = variable1;
      } else {
        Vol = variable2;
      }

      // Wait for the button to be released
      while (digitalRead(buttonPin) == LOW);
    }
  }

  // Print the value of Vol
  Serial.print("Vol: ");
  Serial.println(Vol);

  // Small delay to avoid flooding the Serial Monitor
  delay(500);
}