# Things

A thing's script and bricks live in things/, and apply to every one of it in every room.

`things/<Thing>.lua` is the script on that thing. It is Lua like the room's,
in its own block, where `on("click")`, `on("walk_on")` and `on("walk_off")`
fire for that thing alone and `self.item` names it. Everything else in the
[scripting API](/api/overview) works as in a room script. One script per
thing, 16 KB.

```lua
-- things/Spirit Garden.lua
on("click", function(p)
  local s = members[p.id]
  if s then garden_ui(s) end
end)
```

`things/<Thing>.json` is the bricks on every one of that thing:

```json
{ "bricks": [{ "kind": "sign", "text": "The Spirit Garden: plant blooms, come back, harvest Spirit." }] }
```

## One level, not two

A script goes on the thing, never on a single placed copy. If two copies of
a thing need to behave differently, give them different bricks in the room
(a `sign` with its own text, a `spawn` for a team), or tell them apart in the
script by where they stand (`t.x`, `t.y`) or by a `switch` target name.

## Naming

The file is named like the thing in the game's stock; `eggox stock` lists
the exact names. A `things/` file for a name the stock does not hold refuses
the push: put the mint in first with `eggox stock add`.