#include <Wire.h>
#include <LiquidCrystal_I2C.h>
int sensor = A0;
int bip = 12;
int count = 0;
int state = 0;

LiquidCrystal_I2C lcd(0x27, 16, 2); 
void setup()
{
  lcd.init();
    lcd.init();
      lcd.backlight();
        lcd.setCursor(0, 0);
          lcd.print("Set Amount= ");
            lcd.setCursor(0, 1);
              lcd.print(" Amount=  ");
                lcd.print(count);
                  pinMode(bip, OUTPUT);
                  }
                  void loop()
                  {
                    int counter = digitalRead(sensor);
                      lcd.setCursor (15, 0);
                        lcd.print(counter);
                          if (state == 0)
                            {
                                  switch (counter) {
                                         case 1 : state = 1;
                                                lcd.setCursor (10, 1);
                                                       count = count + 1;
                                                              lcd.print(count);
                                                                     digitalWrite(bip, HIGH);
                                                                            break;
                                                                                   case 0 : state = 0;
                                                                                          digitalWrite(bip, LOW);
                                                                                                 break;
                                                                                                       }
                                                                                                         }

                                                                                                           if (counter == LOW) {
                                                                                                               state = 0;
                                                                                                                   digitalWrite(bip, LOW);
                                                                                                                     }
                                                                                                                     }