> ## Documentation Index
> Fetch the complete documentation index at: https://comfytv.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Pattern

> A procedural clip generator — gradients, noise, color bars, test wheels, countdowns and more, in one ▶ Run.

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  <img src="https://mintcdn.com/comfytv/dMkMxJDZdIo4YzAU/images/nodes/_placeholder.svg?fit=max&auto=format&n=dMkMxJDZdIo4YzAU&q=85&s=b54171099e5b02d4313fe581171ebbcc" alt="Pattern" width="800" height="450" data-path="images/nodes/_placeholder.svg" />
</Frame>

## What this node does

**Pattern** synthesizes a `COMFYTV_VIDEO` from scratch (no input clip) — you choose a **kind** and a resolution/frame rate/duration, and it renders a procedural clip on **▶ Run**. Each kind uses its own subset of the parameters below.

Output is `COMFYTV_VIDEO`. To feed native ComfyUI nodes, insert a **Bridge** — see the [bridge guide](https://github.com/jtydhr88/ComfyTV/blob/main/docs/bridges.md).

## When to use it

* Generate backgrounds, mattes, or transition fills (ramps, radial, noise, plasma).
* Make broadcast test patterns — `colorbars`, `colorwheel`.
* Drop in a countdown/count-up leader before a clip.
* Produce a moving noise/turbulence source to drive other effects.

## Parameters

### kind

Which pattern to generate. Options: `ramp`, `radial`, `rectangle`, `noise`, `perlin`, `turbulence`, `cellular`, `plasma`, `checkerboard`, `colorbars`, `colorwheel`, `count`. Default `ramp`.

### width / height / fps / duration

Output size (`16`–`4096`, default `1280` × `720`), frame rate (`1`–`120`, default `24`), and length in seconds (`0.5`–`120.0` step `0.5`, default `5.0`).

### color0 / color1

The two colors used by two-color patterns (ramp/radial/rectangle/checkerboard). Hex strings, defaults `#000000` (color0) and `#FFFFFF` (color1).

### p0\_x / p0\_y and p1\_x / p1\_y

Start and end points of the **ramp** gradient, normalized `0.0`–`1.0`. Defaults place it as a left-to-right horizontal ramp (`p0` = `0.0, 0.5`, `p1` = `1.0, 0.5`). Move them to angle or reposition the gradient.

### interp

Ramp gradient easing. Options: `linear`, `smooth`, `ease_in`, `ease_out`. Default `linear`.

### softness

Edge softness for shape patterns (radial/rectangle), `0.0`–`1.0`, default `0.0`. Higher feathers the shape edge.

### noise\_scale / noise\_octaves / noise\_speed

Controls for the noise-family kinds (`noise`, `perlin`, `turbulence`, `cellular`, `plasma`). **noise\_scale** feature size `4`–`512` (default `64`), **noise\_octaves** detail layers `1`–`8` (default `4`), **noise\_speed** animation rate `0.0`–`10.0` (default `1.0`).

### seed

Random seed for noise-family patterns, `0`–`99999`, default `7`.

### box\_size

Cell/box size in pixels for `rectangle` and `checkerboard`, `2`–`1024`, default `64`.

### bar\_intensity

Brightness of the `colorbars` pattern, `1.0`–`100.0` (step `1`), default `75.0` (standard 75% bars).

### wheel\_gamma / wheel\_rotate

For `colorwheel`: **wheel\_gamma** `0.0`–`4.0` (default `0.45`) shapes brightness falloff; **wheel\_rotate** `-180`–`180°` (step `1`, default `0`) spins the hue wheel.

### count\_style / count\_direction

For the `count` leader: **count\_style** displays `seconds` or `frames` (default `seconds`); **count\_direction** counts `down` or `up` (default `down`).

## Outputs

| Output    | Type            | Meaning                    |
| --------- | --------------- | -------------------------- |
| **video** | `COMFYTV_VIDEO` | The generated pattern clip |

## Tips

* Most parameters only apply to their pattern family — e.g. `wheel_gamma`/`wheel_rotate` do nothing outside `colorwheel`, `box_size` only affects `rectangle`/`checkerboard`.
* Set a long **duration** and animate `noise_speed` to get a moving texture; static kinds (like `colorbars`) ignore time.
* For a countdown leader, pick `kind = count`, `count_direction = down`, and set **duration** to the count length.

## Related nodes

* **Ken Burns** — animate a still image into video instead of generating a pattern.
* **Wave Warp / Feedback FX** — feed a generated pattern into these for evolving visuals.