Help with masonry CSS for latest posts

Hello.

I have a frontpage here, that display the latest post from our network: http://www.bloggerspoint.dk but I really want it to be in a beautiful masonry style, so I have tried to follow your tutorial here: https://premium.wpmudev.org/blog/add-masonry-grid-layouts-to-your-wordpress-site-with-just-css/

Could you please help me out, with getting my frontpage showing the latest posts in a masonry? I can't figure out how to do it right..