How to get startet with HabPanel

… in order to get some nice looking results?

I started playing around with HabPanel and was already able to display some numbers. So it basically works.

But… there are so many awesome looking panels out there and I wonder how to build something like this.
In my case all the items have a white background and look really boring.

Even the panel in the documentation looks already pretty cool and therefore would be a nice starting point for me.

But I do not find how to customize all the available items like changing color, putting some nice fancy logos in it… ?
Hope you can give me some hints where to look for…