int Trigger = 2;
int Echo = 3;

void setup() {
  Serial.begin(9600);
  pinMode(Trigger, OUTPUT);
  pinMode(Echo, INPUT);
  digitalWrite(Trigger, LOW);
}

void loop (){
  int t;
  int d;

  digitalWrite(Trigger, HIGH);
  delay(10)
  digitalWrite(Trigger,LOW);

  t = pulseIn(Echo, HIGH);
  d = t/59;

  Serial.print("Distancia: ");
  Serial.print(d);
  Serial.print(" cm");
  Serial.println();
  delay(500);
}