写一段layui-步骤条step的代码

以下是一个简单的layui-步骤条step的代码示例：

<div class="layui-container">
  <div class="layui-row">
    <div class="layui-col-md12">
      <fieldset class="layui-elem-field">
        <legend>步骤条示例</legend>
        <div class="layui-field-box">
          <div class="layui-form-item">
            <div class="layui-progress layui-progress-big" lay-showPercent="true">
              <div class="layui-progress-bar layui-bg-blue" lay-percent="33%"></div>
            </div>
          </div>
          <div class="layui-form-item">
            <div class="layui-progress layui-progress-big" lay-showPercent="true">
              <div class="layui-progress-bar layui-bg-green" lay-percent="66%"></div>
            </div>
          </div>
          <div class="layui-form-item">
            <div class="layui-progress layui-progress-big" lay-showPercent="true">
              <div class="layui-progress-bar layui-bg-orange" lay-percent="100%"></div>
            </div>
          </div>
        </div>
      </fieldset>
    </div>
  </div>
</div>

这段代码将会生成一个包含三个步骤的步骤条，每个步骤的进度条颜色不同，分别为蓝色、绿色和橙色。