#include <LiquidCrystal_I2C.h>
#include <Wire.h> 
LiquidCrystal_I2C lcd(0x27, 16, 2);
int BUTTON_5 = 2;
int count =0;
void setup()
{
    Serial.begin(9600);
    lcd.init();
    lcd.backlight();
    lcd.setCursor(0,0); 
    //lcd.print("Hello, world!");
    delay(1000);
}
void loop()
{
channel_select();
}
void channel_select()
{
    if (digitalRead(BUTTON_5) == LOW) 
  {
    while(digitalRead(BUTTON_5)==0);
    //led glowing
    count=count+1; 
    Serial.println(count);
    lcd.setCursor(1,0); 
    lcd.print("Counter: ");
    lcd.print(count);
    delay(500);
  }  
}