scroll box text object?

I'm working on a text based clicker and I have the players actions appending in a text object, but when the box is full it no longer appends.

How do I make the box start to scroll when it fills up with appended text?

Thank you!

I know I've seen this before, but I don't get how they did it. I really don't want to use a plugin if I can help it.

If every action in your text object is followed by a line break (newline expression), then you can remove the oldest lines from the beginning of the text before adding new lines.

For example, your text object can display 4 lines.

When you need to add the 5th line, remove 1st line from the text. You can do this using find(text.text, newline) or tokenat/tokencount expressions.

aaa        bbb        bbb
bbb   ->   ccc   ->   ccc
ccc        ddd        ddd
ddd                   eee
[/code:3bo0spi6]

Alternatively, you can try rex's "Text Scrolling" plugin.