title: Stylus - mixin - variable
body: <p>I think I maybe totally misunderstanding this.</p>
  
  <p>But say I have this repeating css code.</p>
  
  <pre><code>.dot_one {
    animation: dot_one 2s infinite linear;
  }
  .dot_two {
    animation: dot_two 2s infinite linear;
  }
  .dot_three {
    animation: dot_three 2s infinite linear;
  }
  </code></pre>
  
  <p>Shouldn't I be able to extract it as a function like? (but a mixin in stylus)</p>
  
  <pre><code>dot_mix(myVar)
      animation: myVar 2s infinite linear;
  
  dot_mix(.dot_one)
  </code></pre>