<canvas id="fireworksCanvas"></canvas>
  <div id="message">タップしてください</div>

  <div id="controls">
    <button id="autoButton">自動</button>
    <label>余韻の調整: <span id="fadeValue">0.01</span></label>
    <input type="range" id="fadeSlider" min="0.001" max="0.05" step="0.001" value="0.01">
    <label>一度に上がる花火の数: <span id="fireworkCountValue">1</span></label>
    <input type="range" id="fireworkCountSlider" min="1" max="10" value="1">
  </div>