Hi @Dimitri_HDCH Welcome to the forum! 
Here's a snippet similar to the one shown in this post:
Snippet:
{note}Your input: {formtext: name=your_text; default=Hello World}
Keys: {endnote}{repeat: for key in split(your_text, "")}{key: {=key}}{endrepeat}
This will type out each letter individually from your input text. Let us know if it works for you.