#include <LiquidCrystal.h>
 LiquidCrystal lcd(4, 5, 6, 7,8,9);
#define trigPin 12
#define echoPin 11
#define ledPin 13
void setup() {
  Serial.begin (9600);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  lcd.begin(16, 2);
}
 
void loop() {
  long duration, distance;
  digitalWrite(trigPin, LOW); 
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10); 
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = (duration/2) / 29.1;
  
if (distance >= 400 || distance <= 0){
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Distance is: ");
  lcd.setCursor(0,1);
  lcd.print("Out of range");
  digitalWrite(ledPin, HIGH);
   }
  else {
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Distance is: ");
  lcd.setCursor(0,1);
  lcd.print(distance);
  lcd.setCursor(5,1);
  lcd.print("cm");
  digitalWrite(ledPin, LOW);
  }
  }