#include<LiquidCrystal.h>
LiquidCrystal lcd(4,5,6,7,8,9);
int btn=3;
void setup() {
  pinMode(btn, INPUT_PULLUP);
    lcd.begin(16,2);
      // put your setup code here, to run once:

      }

      void loop() {
        if(digitalRead(btn)==0){
            lcd.clear();
              while(1){
                  lcd.setCursor(5,0);
                      lcd.print("Hello");
                          lcd.print(digitalRead(btn));
                          if(digitalRead(btn)==1){

                          }
                            }
                                // put your main code here, to run repeatedly:
                                  }
                                    lcd.setCursor(11,0);
                                    lcd.print(digitalRead(btn));
                                      }