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

int led = 7;
int button = 6;
int valuebutton;

int value = 1000;
int table[16] ={1000, 1001, 1002, 1003, 1004, 1005, 1006, 1007,
                1008, 1009, 1010, 1011, 1012, 1013, 1014, 1015};
int index = 0;

void setup() {
  // put your setup code here, to run once:
lcd.init();
lcd.backlight();
Serial.begin(9600);
pinMode (led, OUTPUT);
pinMode (button, INPUT_PULLUP);

}




void loop() {

  valuebutton = !digitalRead(button); 
   if (valuebutton) {digitalWrite (led, false);}
     else           {digitalWrite (led, true);}

  
  

  for (int line = 0; line <=3; line++){   

  for (int row = 0; row <=19; row = row +5){
    
    lcd.setCursor(row,line);
    lcd.print(table[index]);
   //lcd.print(line);
    index++;
   
    delay(500);

    if (row == 15 and line == 3) {
      index = 0;
      lcd.clear();
    }
  }
  }
  

  




}