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Hide a phrase or image to be discovered using red (or any other color) filter.


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Hello, I need your help and skills :) .

I would like to hide some words or a shape like in this video (I am trying to keep busy some kids with a game, I will print and hide the messages all over the house and let the kids read the messages with a red filter). But I would like to do it inside Paint.net.  I copied the code to CodeLab but it did not work. I tried using Pixelate, adding Noise, playing with layers but I have had no luck.

 

This is the video: 

Spoiler

 

 

This is the site where I found  the code:

 

Edited by Eli
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