How do I create a simple app on Shopify?

How do I create a simple app on Shopify?
Create your first shopify app

Step 1: Register Shopify Partner Account.
Step 2: Create an test store.
Step 3: Install latest Node.js.
Step 4: Install Shopify CLI.
Step 5: Login to Shopify with the CLI.
Step 6: Create a new project.
Step 7: Start a local development server.
Step 8: Install your app on your development store.

Create your first shopify app
  1. Step 1: Register Shopify Partner Account.
  2. Step 2: Create an test store.
  3. Step 3: Install latest Node.js.
  4. Step 4: Install Shopify CLI.
  5. Step 5: Login to Shopify with the CLI.
  6. Step 6: Create a new project.
  7. Step 7: Start a local development server.
  8. Step 8: Install your app on your development store.