#include <Ultrasonic.h>
Ultrasonic usonic(12,13) ;
int ledR = 2 ;
int ledJ = 3 ;
int ledV = 4 ;
int distance ;
void setup() {
  pinMode(ledR,OUTPUT);
  pinMode(ledJ,OUTPUT);
  pinMode(ledV,OUTPUT);
  Serial.begin(9600);
}

void loop() {
  digitalWrite(ledR, LOW);
  digitalWrite(ledJ, LOW);
  digitalWrite(ledV, LOW);
  distance = usonic.read(CM);
  Serial.print("Distance en CM :");
  Serial.println(distance);
  if (distance < 100)
  {
    digitalWrite(ledR, HIGH);
  }
  else if (distance >=100 && distance <= 300)
  {
    digitalWrite(ledJ,HIGH);
  }
  else {
    digitalWrite(ledV, HIGH);
  }
  delay(100);
}