feat(markdown): Initial version for v3 tutorial

markdown/dev/tutorials/pattern-design/draft-method/en.md

@@ -0,0 +1,94 @@
+---
+title: A part's draft method
+order: 150
+---
+
+Time to turn our attention to the draft method of our part.
+Inside our `design/src/bib.js` file, this is what it currently looks like:
+
+```design/src/bib.mjs
+function draftBib({ part }) {
+
+  return part
+}
+```
+
+This is an empty skeleton for a draft method. A draft method should always
+return the part object, and that's effectively the only thing it currently
+does.
+
+## Destructuring the function parameter
+
+If you're not familiar with the `({ part })` syntax you see above, this is a
+technique called *parameter destructuring* or more generally, [object
+desctructuring](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Destructuring_assignment)
+
+The draft method receives only 1 parameter: An object that holds everything you
+need to draft your method.  Destructuring is a way to *pull things out of the
+object into their own variable*. It saves us a bunch of typing as these two are
+equivalent:
+
+<Tabs tabs="Without destructuring, With destructuring">
+<Tab>
+```design/src/bib.mjs
+function draftBib({ part }) {
+
+  return part
+}
+```
+</Tab>
+<Tab>
+```design/src/bib.mjs
+function draftBib(props) {
+
+  return props.part
+
+}
+```
+</Tab>
+</Tabs>
+
+As we'll make our way through this tutorial, we'll need more and more stuff, so
+we'll be pulling it out of the object passed to the draft method via
+*destructuring*.
+
+<Note>
+
+If you're new to JavaScript, and don't intuitively _get this_, stick with it. It will become second nature soon enough.
+
+</Note>
+
+## Destructuring what we need to start drawing our bib
+
+Change the function to look like this:
+
+```design/src/bib.mjs
+function draftBib({ 
+  // highlight-start
+  Path, 
+  Point, 
+  paths, 
+  points, 
+  // highlight-end
+  part,
+}) {
+
+  return part
+}
+```
+
+That's bunch of new lines, but each of one gives us something we'll use in this
+tutorial.
+
+For a complete list of what you can access via destructuring like this, refer
+to [the draft method reference documentation](/reference/api/part/draft).
+Here's a brief summary of the things we've added above:
+
+- `Path`: The Path constructor, allows you to create new Paths
+- `Point`: The Point constructor, allows you to create new Points
+- `points`: A container object to hold the part's points
+- `paths`: A container object to hold the part's paths
+
+Long story short: These will make it possible for you to draw points and paths easily.
+
+So let's go ahead and do that.