Cross Sashay

Think "Slithery Crossfire" — the centers Slither instead of trading. From a wave, centers Slither and step ahead, while the ends Cross Fold.

\phfour{g1n,b2s,b1n,g2s} \phBB{b1n,g2n,g1s,b2s}
1 2 1 2 1 2 1 2
before Cross Sashay after