How to make your own variable

I have no idea how to word this and ask this question but I'm going to try <img>
Example
First with what I am trying to accomplish
You last visited on Today at 5]
What I have
Last Visit: [color=red]%s
So pretty much all I'm doing is adding different lang entries to change the text to display the same thing as before. But I want where it displayed already to remain the same.
So You last visited on becomes Last Visit
So I was wondering how you add the info to load inside the %s
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What I've done
Made and added the files]bf_user_block_block.tpl[/b]
forum/blocks/blocks_imp_bf_user_block.php
Edited the files to include:
forum/language/lang_english/lang_main.php -> Added $lang['Bf_last_visit'] = 'Last Visit]
forum/templates/efusion/bf_user_block_block.tpl -> Added [color=red]{BF_LAST_VISIT}
I've never tried this before and I have already learned so much about it and it comes pretty easy but I'm stuck now. Is there anyone who is experienced in this field or preferably knows of a link describing everything about what I'm trying to do.
Thanks
Example
First with what I am trying to accomplish
You last visited on Today at 5]
What I have
Last Visit: [color=red]%s
So pretty much all I'm doing is adding different lang entries to change the text to display the same thing as before. But I want where it displayed already to remain the same.
So You last visited on becomes Last Visit
So I was wondering how you add the info to load inside the %s
-------
What I've done
Made and added the files]bf_user_block_block.tpl[/b]
forum/blocks/blocks_imp_bf_user_block.php
Edited the files to include:
forum/language/lang_english/lang_main.php -> Added $lang['Bf_last_visit'] = 'Last Visit]
forum/templates/efusion/bf_user_block_block.tpl -> Added [color=red]{BF_LAST_VISIT}
I've never tried this before and I have already learned so much about it and it comes pretty easy but I'm stuck now. Is there anyone who is experienced in this field or preferably knows of a link describing everything about what I'm trying to do.
Thanks