Reciprocate

Typically from a 3/4 tag or Trade By: centers Spin the Windmill while the ends Divide and Touch 3/4.

\syhDBDs{g4w,b4e,g1w,b1e} \sxvlines{b1s,b2s,g3s,g2s}
4 2 4 2 1 3 1 3 1 3 2 4 3 1 2 4
before Reciprocate after