# Custom Blocks + Tutorial Bug - micro:bit Beta 2020
**URL:** https://forum.makecode.com/t/custom-blocks-tutorial-bug-micro-bit-beta-2020/2335
**Category:** micro:bit
**Created:** [June 7, 2020, 2:42pm UTC](https://forum.makecode.com/t/custom-blocks-tutorial-bug-micro-bit-beta-2020/2335 "2020-06-07T14:42:56Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@DillonB07](https://forum.makecode.com/u/DillonB07)
#### Post date: [June 7, 2020, 2:42pm UTC](https://forum.makecode.com/t/custom-blocks-tutorial-bug-micro-bit-beta-2020/2335/1 "2020-06-07T14:42:56Z")
Hey Microsoft MakeCode for micro:bit developers.
Today, I found a bug in the beta editor. When creating a tutorial in GitHub, you can’t include an extension. Here are two snippets of a tutorial.md file.
Doesn’t include custom blocks.
````
## Step 1
Drag the ``||Demo:Love Meter||`` block into the ``||Basic: On Start||`` block. Then look at the simulator. This is what you'll be making. When you've finished drag all the blocks into the category list to delete them.
```blocks
Demo.LoveMeter
```
````
Does include custom blocks.
```
## Step 1
Drag the ``||Demo:Love Meter||`` block into the ``||Basic: On Start||`` block. Then look at the simulator. This is what you'll be making. When you've finished drag all the blocks into the category list to delete them.
```
The custom block is only loaded into the tutorial when I don’t include a preview of the blocks. Please can you fix this?
This is a link to the tutorial.
> **[Microsoft MakeCode for micro:bit](https://makecode.microbit.org/beta#tutorial:github:dillonbarnes/love-meter-tutorial/tutorial)**
>
> A Blocks / JavaScript code editor for the micro:bit powered by Microsoft MakeCode.
---
### Author:  [@richard](https://forum.makecode.com/u/richard)
#### Post date: [June 8, 2020, 5:05pm UTC](https://forum.makecode.com/t/custom-blocks-tutorial-bug-micro-bit-beta-2020/2335/2 "2020-06-08T17:05:11Z")
You need to list the packages in the tutorial using the `package` macro. More docs here:
> **[Macros](https://makecode.com/writing-docs/macros#dependencies)**
>
> MakeCode has several custom macros that extend regular markdown. These provide extra style features and code / blocks rendering in the document pages.