# Structures

Structures are the starting point of all code in Skript. All other code must be nested within a structure so Skript knows when to run it. In many other languages, code can just be run right in the file without a structure. Skript's equivalent of this is the `on load:` event.

{% hint style="warning" %}
Note that each structure is it's own "master section", and must be separate from other structures. Structures can only be the first line of a code chunk, and cannot go within any other structures, or sections.
{% endhint %}

There are three main kinds of structures:

* Events (start with `on`)
  * (Special events called periodical events start with `every`)
* Commands (start with `command`)
* Functions (start with `function`)

Each has their own unique strengths, but also limitations. This section will go over each option and how to use them.

There are also `options:`, `variables:`, and `aliases:` structures that can be used.


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