#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,20,4);
int greenbtn=3;
int redbtn=4;
int count=0;
int pvs1=0;
int pvs2=0;
int led1=5;
int led2=6;
int led3=7;
int led4=8;
int led5=9;
void setup()
{
  lcd.init();
  lcd.backlight();
  Serial.begin(115200);
  pinMode(greenbtn, INPUT);
  pinMode(redbtn, INPUT);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  pinMode(led5, OUTPUT);
}
void loop()
{
  int st1=digitalRead(greenbtn);
  int st2=digitalRead(redbtn);
  if(st1 != pvs1){
    count=count+1;
  }
  if(st2 != pvs2){
    count=count-1;
  }
  if(count <= 0){
    count=0;
    digitalWrite(led5, LOW);
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
    digitalWrite(led4, LOW);
  }
  lcd.setCursor(2,0);
  lcd.print("Counter Project");
  lcd.setCursor(0,1);
  lcd.print("Developed by :-");
  lcd.setCursor(5,2);
  lcd.print("Er Akhil Thakre");
  lcd.setCursor(0,3);
  lcd.print("Counter Value = ");
  lcd.setCursor(16,3);
  lcd.print(count);

  if(count==1){
    digitalWrite(led1, HIGH);
    digitalWrite(led5, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
    digitalWrite(led4, LOW);
  }
  if(count==2){
    digitalWrite(led2, HIGH);
    digitalWrite(led1, LOW);
    digitalWrite(led5, LOW);
    digitalWrite(led3, LOW);
    digitalWrite(led4, LOW);
  }
  if(count==3){
    digitalWrite(led3, HIGH);
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led5, LOW);
    digitalWrite(led4, LOW);
  }
  if(count==4){
    digitalWrite(led4, HIGH);
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
    digitalWrite(led5, LOW);
  }
  if(count==5){
    digitalWrite(led5, HIGH);
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
    digitalWrite(led4, LOW);
  }
  if(count>=6){
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
    digitalWrite(led4, HIGH);
    digitalWrite(led5, HIGH);
    delay(700);
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
    digitalWrite(led4, LOW);
    digitalWrite(led5, LOW);
    delay(1000);
    count=5;
  }

  delay(100);
}