// MAIN
#include <LiquidCrystal.h>
#include <Servo.h>
#define buzzer 8
#define echo 9
#define trig 10
#define serv 6
#define button 7
#define rs 12
#define e 11
#define d4 5
#define d5 4
#define d6 3
#define d7 2
#define trash 20
int i=0;
int ServoClosed ;
LiquidCrystal lcd(rs,e,d4,d5,d6,d7);
Servo servo;
void setup (){
  digitalWrite(button,HIGH);
pinMode(buzzer,OUTPUT);
pinMode(echo,INPUT);
pinMode(trig,OUTPUT);
pinMode(button,INPUT);
servo.attach(serv);
servo.write(ServoClosed);
lcd.begin(16,2);
tone (buzzer,1000);
}

void loop(){

  int x,y;
  digitalWrite(trig,LOW);
  delay(5);
  digitalWrite(trig,HIGH);
  delay(5);
  digitalWrite(trig,LOW);
  x=pulseIn(echo,HIGH);
  y=x*0.034/2;
  
  if(y>=trash){
   if(digitalRead(button)==LOW){
      while (digitalRead(button)==LOW){}
    i++;}
   if (i%2==0){
      lcd.clear();
      lcd.setCursor(6,1);
      lcd.print("FULL");
      tone (buzzer, 1000);
      servo.write(0);
      delay(100);
    }   
    else if (i%2==1){
      lcd.clear();
      lcd.setCursor(4,1);
      lcd.print("NOT FULL");
      noTone(buzzer );
      servo.write(90);
      delay(100);
    }
  }
else if (y<trash){
      noTone (buzzer); 
      lcd.clear();
      servo.write(90);
      lcd.setCursor(4,1);
      lcd.print("NOT FULL"); 
}
}