下面是一個簡單的示例：

```html

<style>

a:before {

content: "";

width: 20px;

height: 20px;

background-color: blue;

border-radius: 50%;

position: absolute;

top: -80px;

a:after {

content: "";

width: 20px;

height: 20px;

background-color: blue;

border-radius: 50%;

position: absolute;

top: -60px;

</style>

```css

font-style: italic;