</div>
            <div class="test-control">
                <label>Update Interval:</label>
                <select id="updateInterval">
                    <option value="100">100ms (fast)</option>
                    <option value="500" selected>500ms (medium)</option>
                    <option value="1000">1000ms (slow)</option>
                </select>
            </div>
            <div class="test-control">
                <label>Update Type:</label>
                <select id="updateType">
     