# Steps

> Runnel pack: a stair of alternating wood and stone blocks falling away from a stone column, on a glazed tray, with a little wooden house at the foot. A wooden ball rises into the cup on the column, hops down the stair a step at a time, landing in a shallow dish on each, and rolls in through the house's round door. Raymarched in WebGL.

- Slug: `runnel-steps`
- Category: [Asset packs](https://www.assembli.design/category/asset-packs.md)
- Subcategory: [Runnel](https://www.assembli.design/category/asset-packs/runnel.md) (`runnel`)
- Type: component
- Tags: 3d, webgl, raymarching, asset, wood, marble, brass, stairs, steps, bounce, ball
- npm dependencies: none
- shadcn/ui dependencies: none
- Added: 2026-10-24
- Live preview: https://www.assembli.design/preview/runnel-steps
- Page: https://www.assembli.design/components/runnel-steps

## Install

One-time setup (needs a subscription):

1. Add the registry to the project's `components.json`: `{"@assembli":{"url":"https://www.assembli.design/r/{name}.json","headers":{"Authorization":"Bearer ${ASSEMBLI_API_KEY}"}}}` (merge into `"registries"`).
2. Put an API key from https://www.assembli.design/account in `.env.local` as `ASSEMBLI_API_KEY=asm_…`.

Then install with the shadcn CLI (writes `components/runnel-steps/runnel-steps.tsx` and installs dependencies):

```bash
npx shadcn@latest add @assembli/runnel-steps
```

Registry item JSON: https://www.assembli.design/r/runnel-steps.json (send `Authorization: Bearer <api key>`)

## Code

> Component source needs an Assembli subscription ($12/month) and an API key sent as `Authorization: Bearer <key>`. To get one without copying anything, POST https://www.assembli.design/api/agent/login (or call the MCP tool connect_account), show the user the link it returns, and poll https://www.assembli.design/api/agent/token for the key. Or subscribe at https://www.assembli.design/pricing and create a key at https://www.assembli.design/account.