Space between Tweets

Hi there,
Thanks for this plugin!

I’m using this on one of my pages with the official-format 1. I’ve customized it a bit to fit my needs (you can see it here: sietsedamen.nl/new). The one problem I can’t figure out is how to get more space between the tweets themselves. Right now there’s no margin between the tweets which isn’t so nice if you see them scrolling. Anything I can do about that with some simple css?

Thanks!
Sietse

https://ww.wp.xz.cn/plugins/rotatingtweets/