LED数字时钟js
1、新建html文档。

2、书写hmtl代码。
<div class="clock">
<div class="digit hours">
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
</div>
<div class="digit hours">
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
</div>
<div class="separator"></div>
<div class="digit minutes">
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
</div>
<div class="digit minutes">
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
</div>
<div class="separator"></div>
<div class="digit seconds">
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
</div>
<div class="digit seconds">
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
<div class="segment"></div>
</div>
</div>

3、书写css代码。
body, html { font-size: 100%; padding: 0; margin: 0; }
*, *:after, *:before { -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box; }
.clearfix:before, .clearfix:after { content: " "; display: table; }
.clearfix:after { clear: both; }
body { background: #000; color: #fff; font-weight: 500; font-size: 1.05em; font-family: "Microsoft YaHei", "Segoe UI", "Lucida Grande", Helvetica, Arial, sans-serif; }

4、书写并添加js代码。<script src="js/digital-clock.js"></script>

5、代码整体结构。

6、查看效果。
