Trailers Circulate. Leads Tag the Line and face right. It's always right.
\syhlines{g2s,b2s,b3n,g3n}
\syhlines{b3n,g3n,b4n,g4n}
before Tag Circulate
after
Because this is a Circulate variant, it can be used in the "anything
anything" construction, as in Tag Percolate. This can lead to
confusion. Phrases like "Tag Percolate" sound more like tagging
variants than Circulate variants, so dancers often start doing the
wrong thing before figuring out what is really wanted.