How do I decrease the space between posts on the main page

Hi, my page is www.bustedcontrollers.com. I would like to decrease the spacing between the articles on the front page, and bring them a bit closer together. How do I go about doing this?

Hi!
Could you give me the URL of your website, please.

My URL was the very first thing I posted. here it is again: http://www.bustedcontrollers.com

Hi!
There is the code:

.one-post {
	margin-bottom: 100px;
}

in the file style.css. You have to decrease the value of this property.

perfect. cheers!