---
title: "Code Highlight Sweep"
description: "A highlight band sweeps across a target line while the surrounding context dims — draws the eye to one line. `line` is 0-based: `line: 1` targets the second displayed line (unlike code-scroll, whose target is 1-based)."
---

<video className="w-full aspect-video rounded-xl object-cover bg-zinc-100 dark:bg-zinc-800" src="https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/code-highlight.mp4" poster="https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/code-highlight.png" autoPlay muted loop playsInline />

## Install

```bash Terminal
npx hyperframes add code-highlight
```

That writes one file: `compositions/code-highlight.html`.

## Add it to your video

It runs for 5 seconds at 1920×1080. Paste this into your composition:

```html index.html
<div
  data-composition-id="code-highlight"
  data-composition-src="compositions/code-highlight.html"
  data-start="0"
  data-duration="5"
  data-track-index="1"
  data-width="1920"
  data-height="1080"
></div>
```

Move it in time with `data-start`. Put it on a different timeline row with
`data-track-index`. See [data attributes](/concepts/data-attributes) for the rest.

## Add it to a project

### Ask your agent

```text
Add the Code Highlight Sweep block from the HyperFrames Catalog to this project.
Replace the demo content with mine and match the existing design and timing.
```

### Install from the terminal

```bash
npx hyperframes add code-highlight
```

## Use it

Ask your agent to replace the example content, match the project style, and place the block at the right moment in the video.

**Wiring it by hand.** The installed block can be added to a host composition with:

```html
<div data-composition-id="code-highlight" data-composition-src="compositions/code-highlight.html" data-start="0" data-duration="5" data-track-index="1" data-width="1920" data-height="1080"></div>
```

## Related topics

- [Browse the complete Catalog](/catalog)
- [Add assets and Catalog items in Studio](/studio/assets-and-blocks)
- [Build a richer composition](/go-further)

{/* hf:generated-footer */}

Tagged `code` `code-animation` `highlight` `developer`.