# Blank Images when I click next

**URL:** https://community.thunkable.com/t/blank-images-when-i-click-next/2994103
**Category:** Questions about Thunkable X
**Created:** [May 9, 2024, 2:51pm UTC](https://community.thunkable.com/t/blank-images-when-i-click-next/2994103 "2024-05-09T14:51:43Z")
**Posts on this page:** 1
**Showing post:** 3

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### Author: ![tatiang](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/tatiang/32/55482_2.png) [@tatiang](https://community.thunkable.com/u/tatiang)
#### Post date: [May 9, 2024, 3:36pm UTC](https://community.thunkable.com/t/blank-images-when-i-click-next/2994103/3 "2024-05-09T15:36:45Z")

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Don’t use this block. Ever. Well, except if you need to initialize a list or set the value of a list.

![Screenshot 2024-05-09 at 8.35.17 AM](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/0/b/0be43d75ac5e3ba7e9ae04c7335bed149a359330.png)

Your `app variable Skin List` is already a list. When you add that block, you create a List of Lists which you want to avoid.

**Longer explanation:** The blocks you used are going to get the value of the variable which is {“Skin1.png”, “Skin2.png”, “Skin3.png”} and then make a list from it so that would be {{“Skin1.png”, “Skin2.png”, “Skin3.png”}} and then get the `app variable index` item from that list. So if you get item #1, you’re getting {“Skin1.png”, “Skin2.png”, “Skin3.png”} but if you get item #2, you’re getting a null value since {{“Skin1.png”, “Skin2.png”, “Skin3.png”}} only has one item.   
  
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Need help? [How to Ask Great Questions](https://community.thunkable.com/t/how-to-ask-great-questions-v2-0/2689983) ✨ [Debugging A Project](https://community.thunkable.com/t/debugging-in-thunkable-x-video/849471) ✨ [API JSON Tutorial](https://community.thunkable.com/t/api-json-tutorial-video/1140575)

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