How do I make rapidly changing text in chat and signs

How can I make rapidly changing text in chat and signs?

I have seen this done in adventure maps. I wanted to use this in my own map but I don't know how.

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2 Answers

This is using the "obfuscated" JSON option. It does not require a server or external program as LucidiousXIV said, it does however require access to commands, which I assume you already have if you're making an adventure map.

To /tellraw it into chat:

/tellraw @a {"obfuscated":"true","text":"This text will not be seen"}

To make a sign with it:

/setblock ~ ~ ~ standing_sign 0 replace {Text1:"{\"text\":\"This text will not be seen\",obfuscated:\"true\"}"}

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If you want this,(this works for me even without access to commands) you have to have a sign and write §k. Then you can type anything. (Do note if you go to the next line, even though it looks like it is still scramble while you write it, it’s not. The way to fix this is to write §k again or write §r.

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