Do you mean like this?

http://imageshack.com/a/img46/4733/q9it.jpg

"Doble accion" just means Double Action.

I'm not at all familiar with magic, spells, or that sort of thing, but from what I gather from a Google search, a "double action" candle is supposed to banish negative influences/energy/blocks (represented by the black portion) that are preventing you from getting something you want, while at the same time gathering or reinforcing what you do want (represented by the color portion). Hence the double action designation.

At least that's the gist of it from what I could tell. I'm sure someone on here would know a lot more on the subject.