text: 
  var pingPong = function(inputNumber) {
    var output = [];
  
    for (var index = 1; index <= inputNumber; index++) {
      if (index % 15 === 0) {
        output.push("pingpong");
      } else if (index % 5 === 0) {
        output.push("pong");
      } else if (index % 3 === 0) {
        output.push("ping");
      } else {
        output.push(index);
      }
    }
    return output;
  }
  
  $(document).ready(function() {
    $("form#pingPong").submit(function(event) {
    event.preventDefault();
  
      $("ul#numberSequence").empty();
  
      var inputNumber = $("input#userNumber").val();
  
      var listResults = pingPong(inputNumber);
        $("ul#numberSequence").empty();
        listResults.forEach(function(result) {
          $("ul#numberSequence").append("<li id='listColor'>" + result + "</li>");
        });
        
    });
  });
  