//YWROBOT
//Compatible with the Arduino IDE 1.0
//Library version:1.1
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,20,4);  // set the LCD address to 0x27 for a 16 chars and 2 line display

// C++ code
//

float seconds1 = 0;

unsigned long tempo1 = 0;
unsigned long tempo2 = 0;


void setup()
{
  lcd.init();
  tempo1 = millis();
  pinMode(8,INPUT_PULLUP);
  pinMode(9,INPUT_PULLUP);
  
}

void loop()
{
  if(digitalRead(8) == 0)
  {
  tempo2 = millis();
  seconds1 = (tempo2 - tempo1)/1000;
  }
  
  
  lcd.setCursor(0,0);
  lcd.print(seconds1);
  
  
}