Adding quickstart links.

Author: rlhagerm

python/example_code/controltower/README.md

@@ -32,6 +32,8 @@ python -m pip install -r requirements.txt
 ```
 
 <!--custom.prerequisites.start-->
+Before running the example, set up a landing zone in order to run the baseline and control management sections.
+Follow the instructions provided by the [quick start](https://docs.aws.amazon.com/controltower/latest/userguide/quick-start.html) guide.
 <!--custom.prerequisites.end-->
 
 ### Get started

scenarios/basics/controltower/README.md

@@ -22,7 +22,7 @@ The scenario follows these steps:
 ### Scenario
 #### Setup
 - List available landing zones and prompt the user if they would like to use an existing landing zone.
-- If no landing zones exist, provide information about setting up a landing zone.
+- If no landing zones exist, provide [information about setting up a landing zone](https://docs.aws.amazon.com/controltower/latest/userguide/quick-start.html).
 
 #### Baselines
 - List available baselines.

scenarios/basics/controltower/SPECIFICATION.md

@@ -27,7 +27,7 @@ For an introduction, see the [README.md](README.md).
 - This example can run with no additional resources, or can use an existing landing zone. Since landing zone creation
 - requires multiple AWS accounts (which cannot be deleted for 7 days), this example does not support creating new
 - landing zones. The example will prompt to use a current landing zone, or run only that portion that doesn't 
-- require landing zone identifiers.
+- require landing zone identifiers. To set up a landing zone, follow the [QuickStart guide](https://docs.aws.amazon.com/controltower/latest/userguide/quick-start.html), and create new accounts when prompted.
 
 ### Hello
 The Hello example is a separate runnable example.