#include <LiquidCrystal_I2C.h>

const  int  buttonPin1  =  2 ,  buttonPin2  =  3 ;     
int  button1_State   =  0 ,   button2_State  =  0 ; 
int  count_value  = 0 ; 
int  prestate  = 0 ; 
LiquidCrystal_I2C LCD ( 0x27 , 16 , 2 ) ;
int led1 = 13 , led2 = 12 ;
 void setup ( ) { 
 // inisialisasi pin tombol sebagai input: 
 pinMode ( buttonPin1 , INPUT ) ; 
 pinMode ( buttonPin2 , INPUT ) ; 
 pinMode(led1 , OUTPUT);
 pinMode(led2 , OUTPUT);
 LCD . init ( ) ; 
 LCD . backlight ( ) ; 
 LCD . setCursor ( 4 , 0 ) ; 
 LCD . print ( "PENGUNJUNG" ) ; 
 LCD . setCursor ( 2 , 1 ) ; 
 LCD . print ( count_value ) ; 
 }
  

 void  loop ( )  { 
  // membaca status nilai tombol tekan: 
  button1_State  =  digitalRead ( buttonPin1 ) ; 
  button2_State  =  digitalRead ( buttonPin2 ) ; 
  // periksa apakah tombol ditekan. Jika ya, buttonState adalah HIGH: 
  if  ( button1_State  ==  HIGH  &&  prestate  ==  0 )  { 
    count_value ++ ;   
  LCD . setCursor ( 0 , 1 ) ; 
  LCD . print ( ">" ) ; 
  LCD . print ( count_value ) ; 
  LCD . print ( " " ) ; 
    prestate  =  1 ; 
    delay(300);
  } 
//kurangi yang lain :
if  ( button2_State  ==  HIGH  &&  prestate  ==  0 )  { 
    count_value -- ; 
  LCD . setCursor ( 0 , 1 ) ; 
  LCD . print ( "<" ) ; 
  LCD . print ( count_value ) ; 
  LCD . print ( " " ) ; 
   prestate  =  1 ; 
   delay(300);
  }  
 else  if ( button1_State  ==  LOW  &&  button2_State  ==  LOW )  { 
    prestate  =  0 ; 
  } 
  if (count_value >= 1) {
  digitalWrite(led1, HIGH );
  }
 else {
  digitalWrite(led1, LOW);
 }
 if (count_value >= 10) {
 digitalWrite(led2, HIGH);
 }
 else {
  digitalWrite(led2, LOW);
 }
}