The dance just about every Bulgarian knows. There’s a couple of basic versions – here’s the most basic, 6-step version. It also seems to be the most popular today in Bulgaria.
The dance in action (below) at a shopping mall in Varna. Notice steps 4 & 6 are not so much kicks as pauses.
The 12-step version seems to be called Pravo Trakijsko Horo these days (“Thracian” Pravo). Below is a “class” showing the 6-step (1st minute, then some teaching of the 12-step (about a minute), then the 12-step (2 minutes or so), followed by an unknown dance.
Here’s my slightly outdated notes, in the sense that it gives the impression the 12-step version is most popular, and that variations are common. Simple 6-step is most common now.