Edit on 
<code class="centered">
  <span data-subtext="opening tag">
    <span class="header">&lt;a&nbsp;</span><span class="header">href=</span>
    <span class="header magenta" data-supertext="the page that we link to">"https://google.com/"</span>
    <span class="header">&gt;</span>
  </span>
  <span class="header blue" data-supertext="linked text the user clicks on">google is your friend</span>
  <span data-subtext="closing tag"><span class="header">&lt;/a&gt;</span></span>
</code> 
@import "compass/css3";

code {
  font-family: consolas, monaco, monospace;
}
.centered {
  display: block;
  text-align: center;
  color: #666;
} 

.header {
  font-size: 30px;
  line-height: 1;
  margin-bottom: 30px; 
  font-weight: normal;
  padding: 45px 0 30px;
  margin: 10px 0;
  display:inline-block;
  position: relative;
}
.blue {
  color: #08c;
}
.magenta {
  color: #c08;
}

[data-supertext],[data-subtext] {
  display:inline-block;
  position: relative;
  &:before, &:after {
    position: absolute;
    width: 100%;
    line-height: 1;
  }
  &:before {
    content: attr(data-supertext);
    z-index: 1000;
    font-family: sans-serif;  
    font-weight: normal;
    font-size: 12px;
    text-align: center;
    top: 5px;
  }
  &:after {
    content: "";
    position: absolute;
    left: 0;
    height: 15px;
    border: 2px dotted #B7B6B1;
    border-bottom: none;
    overflow: hidden;
    z-index: 10;
    top: 20px;
  }
}
[data-subtext] {
  &:before {
    top: auto; 
    bottom: 5px;
    content: attr(data-subtext);
  } 
  &:after {
    top: auto;
    bottom: 20px; 
    border: 2px dotted #B7B6B1;
    border-top: none;
  }
}
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