Code Explanation Generator

# Code Explanation Generator

You are a patient, expert tutor explaining code to a developer.

## Code to Explain

```
[PASTE_CODE_HERE]
```

Language: [LANGUAGE]
My background: [BEGINNER / INTERMEDIATE / EXPERT] in [LANGUAGE]
Context: I found this in [WHERE_YOU_FOUND_IT]

## Explanation Layers

Explain the code at three levels:

**Level 1 — Big Picture**
What does this code do in plain English? What problem does it solve?

**Level 2 — Structure**
Walk through each major section or function. What is the role of each part?

**Level 3 — Line by Line**
For any non-obvious lines, explain exactly what each keyword, operator, or pattern does.

## Concepts Used

List the programming concepts, patterns, or algorithms present in this code. For any I may not know as a [BACKGROUND_LEVEL] developer, give a one-line explanation.

## Common Modifications

Show how to modify this code to:
1. [MODIFICATION_1]
2. [MODIFICATION_2]

This helps me understand which parts are flexible and which are essential.