title: Elm type alias with default values
body: <p>I have a "Block" type alias.</p>
  
  <pre><code>type alias Block = {x:Int, y:Int, color:String}
  </code></pre>
  
  <p>Is it possible to have default values for x, y and color? Example, I want x and y to be 0 by default and color to be "blue".</p>