Here's a basic HTML code structure:

```
<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
</head>
<body>

</body>
</html>
```

*Breakdown:*

1. `<!DOCTYPE html>`: Document type declaration
2. `<html>`: Root element
3. `<head>`: Contains metadata (title, styles, scripts)
4. `<title>`: Page title (appears in browser title bar)
5. `<body>`: Contains page content

*Basic HTML Elements:*

1. Headings: `<h1>`, `<h2>`, `<h3>`, ...
2. Paragraphs: `<p>`
3. Links: `<a>`
4. Images: `<img>`
5. Lists: `<ul>`, `<ol>`, `<li>`
6. Divisions: `<div>`
7. Spans: `<span>`

*Example with basic elements:*

```
<!DOCTYPE html>
<html>
<head>
<title>My Page</title>
</head>
<body>
<h1>Welcome to My Page</h1>
<p>This is a paragraph.</p>
<a href="(link unavailable)">Visit Example</a>
<img src="image.jpg" alt="My Image">
<ul>
<li>Item 1</li>
<li>Item 2</li>
</ul>
</body>
</html>
```