Global Lua Modules/String

Can someone give me a step-by-step, please?

How can I use Global Lua Modules/String to repeat a string like:

word X

Where X starts being 1, and it's incremented by 1 at each repetition?

In other words, I want to input

|source=word X |count=4

And the result should be:

word 1 word 2 word 3 word 4 

Is that possible with that module only?

I couldn't find or understand how to do it with the doc.

I'm making an infobox wherein I want to be able to consistently link to a social media site.

Some inputs are simply of the format of a username, while other inputs are of the "https://twitter.com/something" type. There's also some other pages where it's "@something". And I was thinking I could use Lua to filter out either the Twitter domain, or the @ symbol (or ideally, also the URL with a format such that there's a "www." inside as well), if any are in the input.

I was doing some tests earlier on my user page, and thing is, the only way I could find {{String}} being able to remove all three is by stacking them, which sounds horribly inefficient.

1. Quantifiers like `?` for the patterns accepted by the String template, and by upstream Lua, apparently can only apply to individual characters, so it doesn't detect whenever I try to insert the "www." bit inside `(? )?` syntax.

2. I was thinking the domain should be placed inside parentheses and then be |-able with the @ symbol, thus `^(https://(?:www%.)?twitter%.com/|@)`, but then that pipe character conflicts with how MediaWiki templates are invoked! And I don't know how to escape it... replacing it with {{!}} doesn't seem to work, and I can get why that is.

So that leads me to stacking String regex-filtering. Is there a better way?