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docs/guide/animation.md
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# Animation
Ths chapter discusses how to use Textual's animation system.
Ths chapter discusses how to use Textual's animation system to create visual effects such as movement, blending, and fading.
## Animating styles
Textual's animator can change an attribute from one value to another in fixed increments over a period of time. You can apply this to [styles](styles.md) such `offset` to move widgets around the screen, and `opacity` to create fading effects.
Textual's animator can change an attribute from one value to another in fixed increments over a period of time. You can apply animations to [styles](styles.md) such `offset` to move widgets around the screen, and `opacity` to create fading effects.
Apps and widgets both have an [animate][textual.app.App.animate] method which will animate properties on those objects. Additionally, `styles` objects have an identical `animate` method which will animate styles.
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The easing function determines the journey a value takes on its way to the target value.
It could move at a constant pace, or it might start off slow then accelerate towards its final value.
Textual supports a number of [easing functions](https://easings.net/). Run the following from the command prompt to preview them.
Textual supports a number of [easing functions](https://easings.net/).
<div class="excalidraw">
--8<-- "docs/images/animation/animation.excalidraw.svg"
</div>
Run the following from the command prompt to preview them.
```bash
textual easing