#include <LiquidCrystal_I2C.h> // LCD I2C library

// Set LCD address, number of columns and rows
// If you don't know your display address, run an I2C scanner sketch
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  lcd.init();        // Initialize LCD (can also use lcd.init())
  lcd.backlight();    // Turn on LCD backlight
  pinMode(19, OUTPUT);
  pinMode(18, INPUT);
}

void loop() {
 int pushButton = digitalRead(18);
 while (pushButton == pdTRUE){
  lcd.clear();        // Clear the screen to avoid overlapping text
  lcd.setCursor(0, 0); // Set cursor to first column, first row
  lcd.print("Button is PUSH!"); // Print message on first row
  
  lcd.setCursor(0, 1); // Set cursor to first column, second row
  lcd.print("Time: "); 
  lcd.print(millis() / 1000); // Display seconds since start
  lcd.print("s   "); // Clear remaining characters
  
delay(1000);        // Update every 1 second (reduced for better responsiveness)
digitalWrite(19, HIGH);
delay(300);
digitalWrite(19, LOW);
delay(300);
 } 

 lcd.clear();        // Clear the screen to avoid overlapping text
 lcd.setCursor(0, 0); // Set cursor to first column, first row
 lcd.print("Button NOT PUSH!"); // Print message on first row
delay(1000);
}