Adjusting width of first widget (footer area)

In my opinion would be better adding a fourth widget area.
You can find this code useful:
https://gist.github.com/eri-trabiccolo/c17629195d5416859da2

hope this helps.

Thanks! I must place this code in the Custom CSS panel or where else?

Nope, child-theme functions.php
It’s php couldn’t put it in the css panel ??

I′m getting closer… Now I′m in the “functions.php”.
In which exact place must I paste the code? At the beginnig?
Sorry for so much silly questions, but I′m getting started in this universe. Thanks again!

Dear d4z_c0nf… Don′t worry about my last post.
Surfing in Google I found the answer. If you visit my site you′ll see it is is working.
Really thank you for your time and for your help!

Yeah it does ??
You’re welcome.
Could you mark this topic as resolved?

p.s.
I didn’t worry about your last post, I hadn’t see it yet ??

For any one searching for similar answers, I highly recommend this post.
https://themesandco.com/snippet/adding-fourth-footer-widget-area/
Topic resolved thanks to d4z_c0nf

Resolved.