#include <LiquidCrystal_I2C.h>

int led1 = 13;
int led2 = 12;
int led3 = 11;
int led4 = 10;

int btn1 = 4;
int a = 0;
int b = 0;
int cursor = 0;

int btn2 = 3;
int c = 0;
int d = 0;
bool onOff = true;

int buttonState;
int buttonState2;
int count = 0;

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  pinMode(btn1, INPUT);
  pinMode(btn2, INPUT);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);

  lcd.init();
  lcd.backlight();

  Serial.begin(9600);
}

void l1(){
      lcd.setCursor(0, 0);
      lcd.print(">LED1");
      lcd.setCursor(0, 1);
      lcd.print(" LED2");
      lcd.setCursor(11, 0);
      lcd.print(" LED3");
      lcd.setCursor(11, 1);
      lcd.print(" LED4");
}

void l2(){
  	  lcd.setCursor(0, 0);
      lcd.print(" LED1");
      lcd.setCursor(0, 1);
      lcd.print(">LED2");
      lcd.setCursor(11, 0);
      lcd.print(" LED3");
      lcd.setCursor(11, 1);
      lcd.print(" LED4");
}

void l3(){
  	  lcd.setCursor(0, 0);
      lcd.print(" LED1");
      lcd.setCursor(0, 1);
      lcd.print(" LED2");
      lcd.setCursor(11, 0);
      lcd.print(">LED3");
      lcd.setCursor(11, 1);
      lcd.print(" LED4");
}

void l4(){
      lcd.setCursor(0, 0);
      lcd.print(" LED1");
      lcd.setCursor(0, 1);
      lcd.print(" LED2");
      lcd.setCursor(11, 0);
      lcd.print(" LED3");
      lcd.setCursor(11, 1);
      lcd.print(">LED4");
}

void loop() {
  buttonState = digitalRead(btn1);
  if (buttonState == HIGH) {
    count++;
    if (count > 4) {
      count = 1;
    }
    Serial.println(count);
    delay(500);
  }
  if(count == 0)
    l1();
  else if (count == 1) {
    l1();
    digitalWrite(10, LOW);
    digitalWrite(13, HIGH);
  } else if (count == 2) {
    l2();
    digitalWrite(13, LOW);
    digitalWrite(12, HIGH);
  } else if (count == 3) {
    l3();
    digitalWrite(12, LOW);
    digitalWrite(11, HIGH);
  } else if (count == 4) {
    l4();
    digitalWrite(11, LOW);
    digitalWrite(10, HIGH);
  } else if (count == 5) {
    count = 1;
  }
}