Performa Action when text blitter displays certain number of characters

How can I trigger an event when a text blitter "blits" over a certain number of characters?

For example, starting voice blurbs playing when certain words are displayed on screen. (Only I want to trigger an event only when the text blitter displays 2 or more characters)

Thanks. I don't understand how I'm doing "char index Mod 2 = 0" - How do I access this in the events editor?

In the expressino editor? It provides a syntax error.

Hi, thanks for this - It looks very useful. Can you explain what the "Compare 2 values : char index Mod 2 = 0" part actually does?

(Sorry I understand very little about the expression editor and I want to know what it is I'm using, not just copy something that works haha. I've never used compare 2 values event before as I've never understood it and also "Char Index Mod 2" I don't understand )

It sounds interesting for sure, though I'm already 2 and a half years into a project that uses Text Blitter so I won't change it at this point. Thanks for the help. I don't udnerstand any of the syntax, I use Clickteam because I don't like any of that stuff, I just like to click on objects in the event editor.