# Extension-in-progress: Sprite growth

**URL:** https://forum.makecode.com/t/extension-in-progress-sprite-growth/39732
**Category:** Help
**Tags:** extension, make
**Created:** [October 11, 2025, 11:42pm UTC](https://forum.makecode.com/t/extension-in-progress-sprite-growth/39732 "2025-10-11T23:42:35Z")
**Posts on this page:** 1
**Showing post:** 3

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### Author: ![WoofWoof](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/woofwoof/32/32523_2.png) [@WoofWoof](https://forum.makecode.com/u/WoofWoof)
#### Post date: [October 13, 2025, 2:02am UTC](https://forum.makecode.com/t/extension-in-progress-sprite-growth/39732/3 "2025-10-13T02:02:36Z")

</div>

Using the % sign is a very old and finicky way of linking the blocks up. If you look at newer extensions, you’ll see how you should be doing it with the $ sign. And how to use

```auto
//% sprite.shadow = variable_get
//% sprite.defl = “mySprite”

```

I do not remember if this is the correct syntax. You’ll have to look at a newer extension. It might be variables\_get or get\_variable, idk.

Also, if you want to put things into the sprites tab, you can just use “namespace sprites” without all the “//%” stuff and they will be added. All that stuff only needs to be defined once per namespace, so just using the sprites namespace makes it a lot easier.

You can look at my extension [Making an extension for every JavaScript exclusive feature I can think of!](https://forum.makecode.com/t/making-an-extension-for-every-javascript-exclusive-feature-i-can-think-of/36766) for an example of a newer extension.

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