In the first sentence, can you replace "there is" with "there are" and add a comma after "As you can see"?    In the second sentence, can you describe what "innermost" is, so that readers know exactly what to look at in the diagram? Then you can get rid of the below list. Here's an example:    "The first two pieces you'll see in the code are the `Storage` and the `Fetcher`. We'll start our journey there."