You’re wanting it to look just like the demo site? Here’s a snippet from the first widget on the front page:
Celestial is a fully responsive WordPress theme for you to enjoy viewing your website in your favourite mobile device. I've incorporated the popular Twitter Bootstrap framework to give you more flexibility whether you are on a desktop or an iPhone.
oh that… that’s the Call to Action widget position. I used a text widget for it with the widget title as the first heading and the content below it is:
Created for your blog or business website, Celestial is a gorgeous theme that is fully responsive using Twitter's Bootstrap framework for your favourite mobile device like iPhone, Android, iPad, and more!
In the original theme download, there should be an extras folder and inside that is a call to action snippet of code in a txt file. But the above is basically what it contains.