# Checkbox selection

**URL:** <https://community.thunkable.com/t/checkbox-selection/4107682>\
**Category:** Questions about Thunkable X\
**Tags:** beginner\
**Created:** [September 29, 2025, 10:24am UTC](https://community.thunkable.com/t/checkbox-selection/4107682 "2025-09-29T10:24:18Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![danbasson1ymwcty](https://avatars.discourse-cdn.com/v4/letter/d/67e7ee/32.png) [@danbasson1ymwcty](https://community.thunkable.com/u/danbasson1ymwcty)\
**Post date:** [September 29, 2025, 10:24am UTC](https://community.thunkable.com/t/checkbox-selection/4107682/1 "2025-09-29T10:24:18Z")

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Good day, I want to create a checkbox list that users need to “select 3 to personalize” their feed. i want the continue button to change color only when 3 on more of the options in the list is selected. i am not sure what blocks to use.

 ![128b6a11-3986-4eed-8a93-41900554d2f1](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/9/c/9c57119910bec77038e83722389e30521418edaf.jpeg)

Assistance would be appreciated.

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<div class="post-metadata">

**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:** [September 29, 2025, 2:07pm UTC](https://community.thunkable.com/t/checkbox-selection/4107682/2 "2025-09-29T14:07:11Z")

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Here’s an algorithm:

```

```auto
Set numBoxesChecked to 0

When checkbox value changes
   if newValue = true
      Change numBoxesChecked by 1
   elseif newValue = false
      Change numBoxesChecked by -1    

When continue button is pressed
   if numBoxesChecked ≥ 3
      change scene
   else
      alert: "Please select at least 3 options"

```

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/0/f/0f59f292712368bce16ff80133ae10de8a6f27e8.png) [@system](https://community.thunkable.com/u/system)\
**Post date:** [December 28, 2025, 2:07pm UTC](https://community.thunkable.com/t/checkbox-selection/4107682/3 "2025-12-28T14:07:34Z")

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