Clover Flow

From a Trade by: ends Cloverleaf and then Pass Thru when they get into the middle. Centers Pass Thru and then Cloverleaf.

\sxvlines{g4n,g1s,b3n,b4s} \syhlines{g3e,g4w,b2e,b3w}
4 2 1 3 3 1 4 2 3 1 4 2 2 4 3 1
before Clover Flow after