> ## Documentation Index
> Fetch the complete documentation index at: /llms.txt
> Use this file to discover all available pages before exploring further.
# Starfield
> Seek-safe night-sky overlay: sparse or dense stars in three size tiers that twinkle and drift in two parallax layers, radial-masked to keep the frame center clear
# Starfield
Seek-safe night-sky overlay: sparse or dense stars in three size tiers that twinkle and drift in two parallax layers, radial-masked to keep the frame center clear
**Starfield**
```html starfield.html
```
Copy npx hyperframes add starfield to the clipboard
That writes one file: `compositions/starfield.html`.
## Add it to your video
It runs for 6 seconds at 1920×1080. Paste this into your composition:
```html index.html
```
Move it in time with `data-start`. Put it on a different timeline row with
`data-track-index`. See [data attributes](/concepts/data-attributes.md) for the rest.
## Variables
Every one of these has a default, so the piece works untouched. Set the ones you
want to change on the element:
| Variable | Default | Accepts | What it does |
| - | - | - | - |
| `density` | `sparse` | `sparse`, `dense` | Star count across the frame. |
| `tone` | `warm` | `warm`, `cool`, `white` | Star color mix. |
| `speed` | `slow` | `slow`, `fast` | How fast stars pulse. |
Set them with `data-variable-values` on the element that mounts it. These are the
defaults, so this behaves exactly like the preview above until you change one:
```html wrap
```
{/* hf:generated-footer */}
Tagged `starfield` `night-sky` `stars` `twinkle` `sky` `weather` `overlay` `ambient` `particles` `media-treatment-overlay` `loopable`.
## Related topics
* [Browse the complete Catalog](/catalog.md)
* [Add assets and Catalog items in the browser editor](/studio/assets-and-blocks.md)
* [Put blocks together into one video](/concepts/compositions.md)