#include <LiquidCrystal.h>

//initailize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
int potPin = A0;
int ledPin = 6;
int potValue = 0;
int brightness = 0;
int pBari = 0;
int i = 0;

//progress bar character brightness
byte pBar[8] = {
  B11111,
  B11111,
  B11111,
  B11111,
  B11111,
  B11111,
  B11111,
};

void setup() {
  // put your setup code here, to run once:
  // set our led as an OUTPUT
  pinMode(ledPin, OUTPUT);
  // set up the lcd's number of columns and rows
  lcd.begin(16,2);
  // print amassege to the lcd
  lcd.print("LCD Brigtness");
  // Create the progress bar characters
  lcd.createChar(0, pBar);
}

void loop() {
  // put your main code here, to run repeatedly:
  // clears the LCD screen
  lcd.Clear();
  // print a massege to LCD
  lcd.print("LCD Brigtness");
  // set cursor to linre number 2
  lcd.setCursor(0,1);
  // read the value from the potentiometer
  potValue = analogRead(potPin);
  // turns the potValue into a brightness for the LED
  brightness = map(potValue, 0 1024, 0, 255);
  // lights up the led according to the brightness
  analogWrite(ledPin, brightness);
  // turns the brightness into a percentage for the bar
  pBari = map(brightness, 0, 255, 0, 17);
  // print he progress bar
  for(i=0; i<pBari: i++){
    lcd.setCursor(i,1);
    lcd.write(byte(0));
  }
  //delay 750ms
  delay(750);

}