#include <LiquidCrystal_I2C.h>;
#include <Wire.h>
LiquidCrystal_I2C lcd (0x27, 16,2);
int menit = 0;
int detik1 =6;
int detik2 =4;
int detik3 =3;

void setup() {

lcd.init();
lcd.backlight();  
lcd.begin(16,2); 
}

void loop() {

lcd.setCursor(5,0);
tampil1();
lcd.setCursor(5,1);
lcd.print("halo"); 
lcd.clear();
 delay(1000);
 
 }

 



void tampil1 (){
lcd.println((menit < 10? "0" : "") + String(menit) 
+ ":" +(detik1 < 10 ? "0" : "")+ String(detik1));
  delay(1000);
    detik1--; 
    if (detik1 < 0)
      {
      detik1=0;
      }

}

void tampil2 (){
lcd.println((menit < 10? "0" : "") + String(menit) 
+ ":" +(detik2 < 10 ? "0" : "")+ String(detik2));
  delay(1000);
    detik2--; 
    if (detik2 < 0)
      {
      detik2=0;
      }
}