function generateQuestion() {
  let currentQuestion = STORE[questionNumber];
  // questionNumber++; do after feedback
  // generate quiz questions, one at a time
  console.log('`generateQuestion` ran');
  const questionsString = `<section>
        <h2>${currentQuestion.question}</h2>
        <form>
          <fieldset>
            <label class="answerOption" for="answer1">
              <input type="radio" name="answer1" id="answer1">
              <span id="answer1"><img class="col-3" src=${currentQuestion.answers[0].src} alt="${currentQuestion.answers[0].alt}></span>
            </label>
            <label class="answerOption" for="answer2">
              <input type="radio" name="answer2" id="answer2">
              <span id="answer2"><img class="col-3" src=${currentQuestion.answers[1].src} alt="${currentQuestion.answers[1].alt}></span>
            </label>
            <label class="answerOption" for="answer3">
              <input type="radio" name="answer3" id="answer3">
              <span id="answer3"><img class="col-3" src=${currentQuestion.answers[2].src} alt="${currentQuestion.answers[2].alt}></span>
            </label>
            <label class="answerOption" for="answer4">
              <input type="radio" name="answer4" id="answer4">
              <span id="answer4"><img class="col-3" src=${currentQuestion.answers[3].src} alt="${currentQuestion.answers[3].alt}></span>
            </label>
          </fieldset>
          <div>
            <button id="submit-button" type="submit">Submit</button>
          </div>
        </form>
      </section>`;