text: var topic = [
      "尚未開學",
      "國定假日",
      "環境準備",
      "隨機性",
      "重複性",
      "條件判斷"
  ];
  
  var startDate = new Date();
  
  function setMonthAndDay(startMonth, startDay){
      startDate.setMonth(startMonth-1, startDay);
      startDate.setHours(0);
      startDate.setMinutes(0);
      startDate.setSeconds(0);
  }
  
  setMonthAndDay(4, 1);