// Created by Simple Circuits 
#include <Wire.h> 
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,16,2);   

#include <Servo.h> 

Servo myservo;

int IR1 = 2, IR2 = 3;
int Slot = 5, flag1 = 0, flag2 = 0;

void setup()
{
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  
  pinMode(IR1, INPUT);
  pinMode(IR2, INPUT);
  
  myservo.attach(5);
  myservo.write(100);
  
  lcd.setCursor (0,0);
  lcd.print("     ARDUINO    ");
  lcd.setCursor (0,1);
  lcd.print(" PARKING SYSTEM ");
  delay (2000);
  lcd.clear();  
}

void loop()
{ 
  if(digitalRead (IR1) == LOW && flag1==0)
  {
    if(Slot>0)
    {
      flag1=1;
      if(flag2==0)
      {
        myservo.write(0);
        Slot = Slot-1;
      }
    }
    else
    {
      lcd.setCursor (0,0);
      lcd.print("    SORRY :(    ");
      lcd.setCursor (0,1);
      lcd.print("  Parking Full  ");
      delay (3000);
      lcd.clear();
    }
  }
  if(digitalRead (IR2) == LOW && flag2==0)
  {
    flag2=1;
    if(flag1==0)
    {
      myservo.write(0);
      Slot = Slot+1;
    }
  }
  if(flag1==1 && flag2==1)
  {
    delay (1000);
    myservo.write(100);
    flag1=0, flag2=0;
  }
  
  lcd.setCursor (0,0);
  lcd.print("    WELCOME!    ");
  lcd.setCursor (0,1);
  lcd.print("Slot Left: ");
  lcd.print(Slot);
}