#include <LiquidCrystal_I2C.h>


uint8_t pacman[8] = {
  0b00000,
  0b00000,
  0b01110,
  0b11011,
  0b11111,
  0b01110,
  0b00000,
  0b00000
};

uint8_t pacmanOpen[] = {
  0b00000,
  0b00000,
  0b01110,
  0b11011,
  0b11100,
  0b01110,
  0b00000,
  0b00000
};

uint8_t dot[] = {
  0b00000,
  0b00000,
  0b00000,
  0b00110,
  0b00110,
  0b00000,
  0b00000,
  0b00000
};


  int LED = 12;
  int LED1 = 13;
  int contador=0;
int detector=0;
const int Trigger = 2;   
const int Echo = 3; 
LiquidCrystal_I2C lcd(0x27,20,4);  



void setup()
{

  Serial.begin(9600);
  pinMode(Trigger, OUTPUT); 
  pinMode(Echo, INPUT);  
  digitalWrite(Trigger, LOW);
  lcd.init();                  

  lcd.backlight();
  lcd.createChar(1, pacman);
  lcd.createChar(2, dot);
  lcd.begin(20, 4);

  lcd.setCursor(8, 2);
  lcd.print("");

}


void loop()
{
  long t; 
long d; 

digitalWrite(Trigger, HIGH);
delayMicroseconds(10);          
digitalWrite(Trigger, LOW);
t = pulseIn(Echo, HIGH); 
d = t/59;             
  
Serial.print("Distancia: ");
Serial.print(d);      
Serial.print("cm");
Serial.println();
delay(100);        

if(d>=1 && d<=100){
  detector++;
}
else{detector=0;}

if(detector==1){
  contador++;
}

  lcd.setCursor(9,1);
  lcd.print(contador);
  if(contador == 31)
  {
    lcd.setCursor(3,1);
    while(true)
    {
        for (int i = 3; i < 16; i++) {
    lcd.setCursor(i, 3);
    lcd.print("\1");
    for (int j = i + 1; j < 16; j++) {
      lcd.setCursor(j, 3);
      lcd.print("\2");
    }
    lcd.createChar(1, pacman);
    delay(200);
    lcd.createChar(1, pacmanOpen);
    delay(200);
    lcd.setCursor(i, 3);
    lcd.setCursor(3, 3);
    lcd.print(" AFORO LLENO");
      lcd.setCursor(1, 0);
  lcd.print("MAXIMO DE PERSONAS");
  }
  
  digitalWrite(LED, HIGH);
  digitalWrite(LED1, HIGH);

  }}}