#include <LiquidCrystal.h>

LiquidCrystal lcd(15, 2, 4, 5, 18, 19);

void setup(){
  lcd.begin(16,2);

  pinMode(14, OUTPUT);
  pinMode(12, INPUT);
  pinMode(13, OUTPUT);
  lcd.setCursor(0, 0);
  lcd.print("Distance: ");
  lcd.setCursor(0, 1);
  lcd.print("Brightness: ");
}

void loop(){
  int trigPin = 13;
  int echoPin = 12;

  long duration = 0;
  int distance = 0;
  digitalWrite(trigPin, LOW);
  digitalWrite(trigPin, HIGH);
  duration = pulseIn(echoPin, HIGH);
  distance = duration*(0.034/2);
  lcd.setCursor(10, 0);
  lcd.print(distance);
  int val = map(distance, 0, 399, 0, 255);
  lcd.setCursor(12,1);
  lcd.print(val);
  analogWrite(14, val);
}