---

void setup() {
  pinMode(12, OUTPUT);
  pinMode(11, INPUT);
  pinMode(7, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  digitalWrite(12, LOW);
  delayMicroseconds(2);
  digitalWrite(12, HIGH);
  delayMicroseconds(10);
  digitalWrite(12, LOW);

  long dur = pulseIn(11, HIGH);
  int dist = dur * 0.034 / 2;
  Serial.println(dist);Serial.print(": distanzchiya");
  if(dist <= 200){
    tone(7,1000);
  }
  else if(dist >= 201){
    noTone(7);
  }
}