int pinsCount=10;
int pins[] = {2,3,4,5,6,9,10,11,12,13};

#include <LiquidCrystal.h>
LiquidCrystal lcd(9, 8, 7, 6, 5, 4);

void setup() {
    Serial.begin(9600);
  lcd.begin(20, 4);
  lcd.setCursor(2, 1);
  lcd.println("Hello Everyone!");
  Serial.println("Hello Everyone!");
  delay(1000);
  lcd.noDisplay();
  delay(1000);

  lcd.begin(20, 4);
  lcd.setCursor(5, 1);
  lcd.println("This is a");
  lcd.setCursor(3, 2);
  lcd.println("binary counter");
  Serial.println("This is a binary counter");
  delay(1000);
  lcd.noDisplay();
  delay(1000);

  for (int i=0; i<pinsCount; i=i+1){
    pinMode(pins[i], OUTPUT);
  }
}

void loop() 
{
  for (int i=0; i<256; i=i+1) 
  {
    Serial.println(i);
    byte a = i % 2;
    byte b = (i / 2) % 2;
    byte c = (i / 4) % 2;
    byte d = (i / 8) % 2;
    byte e = (i / 16) % 2;
    byte f = (i / 32) % 2;
    byte g = (i / 64) % 2;
    byte h = (i / 128) % 2;

    digitalWrite(3, a);
    digitalWrite(4, b);
    digitalWrite(5, c);
    digitalWrite(6, d);
    digitalWrite(7, e);
    digitalWrite(10, f);
    digitalWrite(11, g);
    digitalWrite(12, h);

    lcd.begin(20, 4);
    lcd.setCursor(5, 2);
    lcd.print(h);
    lcd.print(g);
    lcd.print(f);
    lcd.print(e);
    lcd.print(d);
    lcd.print(c);
    lcd.print(b);
    lcd.print(a);

    delay(2000);
  }
   for (int i=255; i>0; i=i-1) 
  {
    Serial.println(i);
    byte a = i % 2;
    byte b = (i / 2) % 2;
    byte c = (i / 4) % 2;
    byte d = (i / 8) % 2;
    byte e = (i / 16) % 2;
    byte f = (i / 32) % 2;
    byte g = (i / 64) % 2;
    byte h = (i / 128) % 2;

    digitalWrite(3, a);
    digitalWrite(4, b);
    digitalWrite(5, c);
    digitalWrite(6, d);
    digitalWrite(7, e);
    digitalWrite(10, f);
    digitalWrite(11, g);
    digitalWrite(12, h);

    lcd.begin(20, 4);
    lcd.setCursor(5, 2);
    lcd.print(h);
    lcd.print(g);
    lcd.print(f);
    lcd.print(e);
    lcd.print(d);
    lcd.print(c);
    lcd.print(b);
    lcd.print(a);

    delay(50);
  }
}