MovieMaker.js

function MovieMaker(name) {
 	var ticketsSold = 0;
  
  document.write(
    `<div className="Movie" id="movie-${name}">
    	<h4>${name}</h4>
      <button id="Buyone-${name}">Buy one</button>
      <button id="Familypack-${name}">Family pack</button>
    </div>`
    );
  
  var elem = document.getElementById(`Buyone-${name}`);
  elem.onclick = function() {
     	ticketsSold++; 
  };
  
  var elem = document.getElementById(`Familypack-${name}`);
  elem.onclick = function() {
     	ticketsSold += 5;
  };
  
  return {
    name: name,
    ticketsSold: function() { return ticketsSold } 
  };
}

var movies = [
  MovieMaker("Jocker"),
  MovieMaker("Last Chance Harvey"),
  MovieMaker("The same kind of diffrent as me")
];

setInterval(function(){
  movies.forEach(function(movie) {
    console.log(movie.ticketsSold(), ' tickets sold for ', movie.name);
  });
}, 2000);