Continue to [Magic] [Cross] Invert

This continues an Invert the Column, from wherever the partial invert has finished, for one more quarter, or however many additional quarters the caller says. Recognizing a partially completed Invert the Column can be tricky. If you are in waves, the invert has gone 1/2, and the center of the wave looking out is the person who has the important part.

\syhlines{b2n,g2s,g3n,b3s}	\sxvBBBs{g3s,...,b3s,g4n,b4s,...}

before Continue to Invert another 1/4	after