Here's a simple and visually appealing representation of some Markdown formatting techniques you mentioned:

```markdown

**Bold Text:** This is an example of bold text.

_Italicized Text:_ This is an example of italicized text.

__Underlined Text:__ This is an example of underlined text.

- Unordered List:

- Sub-list item 1

- Sub-list item 2

1. Ordered List:

1. Sub-list item A

2. Sub-list item B

> Blockquote: This is an example of a blockquote.

```code

```javascript

// Code Block

function add(a, b) {

return a + b;

}

console.log(add(5, 3));

```

This is the generated image using the `` command for Markdown formatting techniques:

[![Image of Markdown Formatting]()]()