No problem! I'm glad to help. If you go to Appearance > Editor and select the style.css (this should be what is selected by default). Make sure you are in the correct theme or child theme (which is shown in the dropdown up in the top right).
Go all the way to the bottom of the CSS page and just copy that code at the end. If you're still having any issues with it just let me know. I'll be happy to put it in for you or take a look.
I also just realized this may be an issue based on resolution, which could be why mcunha98 was seeing nothing wrong. If you have a few friends on different sized resolutions, you might want to have them check it out on their computers. You can find out what size resolution you have at http://www.whatismyscreenresolution.com/ Some themes display differently based on the resolution of the screen. (Mine is 1280 x 786 on the laptop) If very few of your visitors have the screen size that does not show that space, it might not be worth changing it. However, if your visitors come to your site with a variety of screen sizes. there are ways to have the css change based on the screen resolution of the visitor.
Let me know if you need any further help.