#include <LiquidCrystal_I2C.h>

int ledPin[]={7,8,9,10};

LiquidCrystal_I2C lcd_1(0x27, 16, 2);

void setup() {
  // put your setup code here, to run once:
 for (int i=0;i<4;i++){
  pinMode(ledPin[i], OUTPUT);
 }
 lcd_1.init();
 lcd_1.setBacklight(1);
 lcd_1.setCursor(4,0);
 lcd_1.print("in binary is");
}

void loop() {
  // put your main code here, to run repeatedly:

for (int x =0;x<16;x++)
{
  lcd_1.clear();
  lcd_1.setCursor(0,0);
  lcd_1.print(x);
  lcd_1.print(" in binary is");
  displayBinary(x);
  delay(1000);
}
}

void displayBinary(byte numToShow)
{
  
  for (int i =0;i<4;i++)
  {
    lcd_1.setCursor(i,1);
    if (bitRead(numToShow, i)==1)
    {
      digitalWrite(ledPin[i], HIGH);
      lcd_1.setCursor(3-i,1);
      lcd_1.print(1);
    }
    else
    {
      digitalWrite(ledPin[i], LOW);
      lcd_1.setCursor(3-i,1);
      lcd_1.print(0);
    }
  
  }

}