int n = 10;
void setup() {
  // put your setup code here, to run once:
  for (int i = 7; i <= 13; i++) pinMode(i, INPUT_PULLUP);
  pinMode(2, OUTPUT);
  Serial.begin(9600);
  pinMode(A0, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int flag = 0;
  for (int i = 7; i <= 13; i++) {
    n = 10 + (analogRead(A0) / 1024.0 * 200.0);
    Serial.print(digitalRead(i));
    Serial.print(" ");
    if (digitalRead(i) == 0) flag = 1, tone(2, (13 - i + 8) * n);
  }
  if (flag == 0) noTone(2);
  Serial.println();
}