from machine import Pin
from gpio_lcd import GpioLcd
import time 

lcd = GpioLcd(rs_pin=Pin(16),
                enable_pin=Pin(17),
                d4_pin=Pin(18),
                d5_pin=Pin(19) ,         
                d6_pin=Pin(20),
                d7_pin=Pin(21),
                num_lines=2,
                num_columns=16
                )

lcd.putstr("hello")
button = Pin(0,Pin.IN,Pin.PULL_DOWN)    
while 1:
    x= button.value()
    if(x == 1):
        lcd.putstr(str(x))
        time.sleep(1)