---
title: "Scripts as Behaviour Components"
content_type: tutorial
url: "https://learn.unity.com/tutorial/scripts-as-behaviour-components?language=en"
language: en
difficulty: beginner
duration_minutes: 5
unity_version:
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  - "2017.4"
  - "2017.3"
  - "2017.2"
  - "2017.1"
  - "5.x"
  - "4.x"
supported_unity_versions:
  - name: "2019.3"
    url: "https://learn.unity.com/tutorial/scripts-as-behaviour-components.md?language=en&version=2019.3"
  - name: "2019.2"
    url: "https://learn.unity.com/tutorial/scripts-as-behaviour-components.md?language=en&version=2019.2"
  - name: "2019.1"
    url: "https://learn.unity.com/tutorial/scripts-as-behaviour-components.md?language=en&version=2019.1"
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    url: "https://learn.unity.com/tutorial/scripts-as-behaviour-components.md?language=en&version=2018.4"
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    url: "https://learn.unity.com/tutorial/scripts-as-behaviour-components.md?language=en&version=2018.2"
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    url: "https://learn.unity.com/tutorial/scripts-as-behaviour-components.md?language=en&version=2018.1"
  - name: "2017.4"
    url: "https://learn.unity.com/tutorial/scripts-as-behaviour-components.md?language=en&version=2017.4"
  - name: "2017.3"
    url: "https://learn.unity.com/tutorial/scripts-as-behaviour-components.md?language=en&version=2017.3"
  - name: "2017.2"
    url: "https://learn.unity.com/tutorial/scripts-as-behaviour-components.md?language=en&version=2017.2"
  - name: "2017.1"
    url: "https://learn.unity.com/tutorial/scripts-as-behaviour-components.md?language=en&version=2017.1"
  - name: "5.x"
    url: "https://learn.unity.com/tutorial/scripts-as-behaviour-components.md?language=en&version=5.x"
  - name: "4.x"
    url: "https://learn.unity.com/tutorial/scripts-as-behaviour-components.md?language=en&version=4.x"
last_updated: "2026-09-30T20:32:56.000Z"
---

# Scripts as Behaviour Components

What are Scripts in Unity? Learn about the behavior component that is a Unity script, and how to Create and Attach them to objects.

Next: [Variables and Functions](https://learn.unity.com/tutorial/variables-and-functions?projectId=5c8920b4edbc2a113b6bc26a)

## Scripts as Behaviour Components

[Video](http://www.youtube.com/watch?v=Z0Z7xc18CcA)

```csharp
using UnityEngine;
using System.Collections;

public class ExampleBehaviourScript : MonoBehaviour
{
    void Update()
    {
        if (Input.GetKeyDown(KeyCode.R))
        {
            GetComponent<Renderer> ().material.color = Color.red;
        }
        if (Input.GetKeyDown(KeyCode.G))
        {
            GetComponent<Renderer>().material.color = Color.green;
        }
        if (Input.GetKeyDown(KeyCode.B))
        {
            GetComponent<Renderer>().material.color = Color.blue;
        }
    }
}
```