#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,20,4);

void setup()
{
  lcd.init();                     
  lcd.backlight();
  long i=5;
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print("Seconds left");
  lcd.setCursor(0,1);
  lcd.print(i);
  
  while (i!= 0){
  for (i;i>0;i--){
  lcd.setCursor(0,1);
  lcd.print(i);
  lcd.print("   ");
  delay(1000);
}
  if(i==0)
  {
  lcd.setCursor(0,0);
  lcd.println(" STOP        "); 
  delay(3000);  
  lcd.setCursor(0,1);
  lcd.print("Time is up");
 
}
}
}
void loop()
{}